Alright, now it's time to do a list of per slot item values! Gonna do everything except Trinkets, you can see my Trinkets thread for that list of values. I'm also going to keep it strictly epics just to try and keep the list easier to update.
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Stat Values as of 4.0.3a:
Intellect 1.0
Spell Power 0.7935
Haste 0.5031
Crit 0.4040
Mastery 0.3857
Spirit/Hit 0.3741
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Head(Not going to include Meta Gems, but will include Rare Gem)
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#1 Crown of the Twilight Queen
351 Intellect = 351PP
264 Crit = 105.6PP
244 Haste = 122PP
20Int/Spir+30int socket bonus = 57.4PP
636PP Total Value
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#2 Helm of Eldritch Authority(Heroic)
325 Intellect = 325PP
217 Spirit = 80.29
237 Haste = 118.5PP
40int+30 Haste socket bonus = 55PP
578.79PP Total Value
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#3 Mercurial Hood(Heroic)
325 Intellect = 325PP
217 Haste = 108.5PP
237 Mastery = 90.06
40int + No bonus= 40PP(Int/spir+bonus would be 39.4PP)
563.56PP Total Value
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#4 Helm of Eldritch Authority(Normal)
281 Intellect = 281PP
188 Spirit = 69.56PP
208 Haste = 104PP
40int+30 Haste Socket Bonus = 55PP
509.56PP Total Value
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#5 Je'Tze's Sparkling Tiara
281 Intellect = 281PP
201 Spirit = 74.37
185 Haste = 92.5
40int+30 Haste Socket Bonus = 55PP
502.87PP Total Value
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#6 Mercurial Hood(Normal)
281 Intellect = 281PP
188 Haste = 94PP
208 Mastery = 79.04PP
40int+No bonus = 40PP
494.04PP Total Value
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Neck
#1 Valonia's Medallion(Heroic)
215 Intellect = 215PP
143 Haste = 71.5PP
143 Mastery = 54.34PP
340.84PP Total Value
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#2 Wyrmbreaker's Amulet(Heroic)
215 Intellect = 215PP
143 Spirit = 52.91PP
143 Crit = 57.2PP
325.11PP Total value
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#3 Valonia's Medallion(Normal)
190 Intellect = 190PP
127 Haste = 63.5
127 Mastery = 48.26
301.76PP Total value
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#4 Dorian's Lost Necklance
190 Intellect = 190PP
134 Haste = 67PP
114 Mastery = 43.32
300.32PP Total Value
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Shoulders
#1 Mercurial Shoulderwraps(Heroic)
266 Intellect = 266PP
171 Spirit = 63.27PP
191 Haste = 95.5PP
40Int+10 Haste Socket Bonus = 45PP
469.7PP Total Value
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#2 Mantle of Roaring Flames(Heroic)
266 Intellect = 266PP
191 Crit = 76.4PP
171 Haste = 85.5PP
40Int+No socket Bonus = 40PP
467.9PP Total Value
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#3 Mercurial Shoulderwraps(Normal)
233 Intellect = 233PP
149 Spirit = 55.13PP
169 Haste = 84.5PP
40Int+10 Haste Socket Bonus = 45PP
417.63PP Total value
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#4 Mantle of Roaring Flames(Normal)
233 Intellect = 233PP
169 Crit = 67.6PP
149 Haste = 74.5PP
40Int+No Socket Bonus = 40PP
415.1PP Total Value
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Cloak
#1 Shroud of Endless Grief
209 Intellect = 209PP
133 Haste = 66.5PP
153 Mastery = 58.14PP
20Int/20Haste+10Int Socket Bonus = 40PP(40int+No socket bonus provides same value)
373.64PP Total Value
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#2 Drape of the Twins(Heroic)
215 Intellect = 215PP
143 Spirit = 52.91PP
143 Haste = 71.5PP
339.41PP Total Value
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#3 Ritssyn's Ruminous Drape
170 Intellect = 170PP
107 Haste = 53.5PP
127 Mastery = 48.26
20int/20haste+10Int Socket Bonus = 40PP(40int+No socket bonus provides same value)
311.76PP Total Value
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#4 Haunt of Flies
190 Intellect = 190PP
127 Haste = 63.5PP
127 Crit = 50.8PP
304.3PP Total Value
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#5 Drape of Twins
190 Intellect = 190PP
127 Spirit = 46.99PP
127 Haste = 63.5PP
300.49PP Total Value
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Chest
#1 Mercurial Vestment(Heroic)
345 Intellect = 345PP
247 Crit = 98.8PP
227 Haste = 113.5PP
60Int/20Spir+20Int Socket Bonus = 87.4PP
644.7PP Total Value
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#2 Shadowforge's Lightbound Smock(Heroic)
345 Intellect = 345PP
257 Spirit = 95.09PP
217 Haste = 108.5PP
80Int+No Socket Bonus = 80PP
628.59PP Total Value
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#3 Mercurial Vestment(Normal)
301 Intellect = 301PP
218 Crit = 87.2PP
198 Haste = 99PP
60int/20Spir+20Int Socket Bonus = 87.4PP
574.6PP Total Value
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#4 Shadowforge's Lightbound Smock
301 Intellect = 301PP
228 Spirit =84.36
188 Haste = 94PP
80int+No Socket Bonus = 80PP
559.36PP Total Value
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Wrist
#1 Bracers of the Dark Mother
209 Intellect = 209PP
133 Spirit = 49.21PP
153 Mastery = 58.14PP
20int/20Haste+10int Socket Bonus = 40PP(40int+No socket bonus provides same value)
356.35PP Total Value
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#2 Bracers of the Bronze Flight(Heroic)
215 Intellect = 215PP
143 Haste = 71.5PP
143 Mastery = 54.34PP
340.84PP Total Value
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#3 Bracers of the Burningeye(Heroic)
215 Intellect = 215PP
143 Spirit = 52.91PP
143 Haste = 71.5PP
339.41PP Total Value
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#4 Bracers of the Bronze Flight
190 Intellect = 190PP
127 Haste = 63.5PP
127 Mastery = 48.26PP
301.76PP Total Value
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#5 Bracers of the Burningeye
190 Intellect = 190PP
127 Spirit = 46.99PP
127 Haste = 63.5PP
300.49PP Total Value
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Gloves
#1 Hands of the Twilight Council(Heroic)
266 Intellect = 266PP
191 Crit = 76.4PP
171 Haste = 85.5
40Int+10Crit Socket Bonus = 44PP
471.9PP Total Value
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#2 Brackish Gloves(Heroic)
266 Intellect = 266PP
171 Spirit = 63.27PP
191 Haste = 95.5PP
40int+10Haste Socket Bonus = 45PP
469.77PP Total Value
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#3 Mercurial Gloves(Heroic)
266 Intellect = 266PP
171 Crit = 68.4PP
191 Mastery = 72.58PP
40int+No Socket Bonus = 40PP
446.98PP Total value
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#4 Hands of the Twilight Council/Grips of the Failed Immortal
233 Intellect = 233PP
169 Crit = 67.6PP
149 Haste = 74.5PP
40int+10Crit Socket Bonus = 44PP
419.1PP Total Value
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#5 Brackish Gloves/Wound Splicer Handwraps
233 Intellect = 233PP
149 Spirit = 55.13PP
169 Haste = 84.5PP
40int+10Haste Socket bonus = 45PP
417.63PP Total Value
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#6 Flamebloom Gloves
233 Intellect = 233PP
169 Mastery = 64.22PP
149 Haste = 74.5PP
40Int+No socket bonus = 40PP
411.72PP Total Value
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#7 Mercurial Gloves
233 Intellect = 233PP
149 Crit = 59.6PP
169 Mastery = 64.22PP
40int+No socket Bonus = 40PP
396.82PP Total Value
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Waist(All belts will include the BS Socket)
#1 Belt of Arcane Storms(Heroic)
266 Intellect = 266PP
171 Crit = 68.4PP
191 Haste = 95.5PP
60int/20Haste+20Haste Socket Bonus = 80PP(40int+No socket bonus provides same value)
509.9PP Total Value
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#2 X-Tron Duct Tape(Heroic)
266 Intellect = 266PP
191 Spirit = 70.67PP
171 Crit = 68.4PP
60int/20Haste+10Int Socket Bonus = 80PP(40int+No socket bonus provides same value)
485.07PP Total Value
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#3 Belt of Arcane Storms
233 Intellect = 233PP
149 Crit = 59.6PP
169 Haste = 84.5PP
60int/20Haste+20Haste Socket Bonus = 80PP(40int+No socket bonus provides same value)
457.1PP Total Value
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#4 Belt of the Depths
233 Intellect = 233PP
152 Spirit = 56.24PP
165 Haste = 82.5PP
80int+No Socket Bonus = 80PP
451.74PP Total Value
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Legs(Will NOT include the leg armor)
#1 Mercurial Leggings(Heroic)
345 Intellect = 345PP
217 Spirit = 80.29PP
257 Haste = 128.5PP
60int/20Haste+20int Socket Bonus = 90PP
644.29PP Total Value
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#2 Flame Pillar Leggings(Heroic)
345 Intellect = 345PP
257 Hit = 95.09PP
217 Crit = 86.8PP
80Int+No Socket Bonus = 80PP
606.89PP Total Value
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#3 Mercurial Leggings
301 Intellect = 301PP
188 Spirit = 69.56PP
228 Haste = 114PP
60int/20Haste+20int Socket Bonus = 90PP
574.56PP Total Value
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#4 Breeches of Mended Nightmares
321 Intellect = 321PP
214 Crit = 85.6PP
216 haste = 108PP
40Int+10Haste Socket Bonus = 45PP
559.6PP Total value
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Boots
#1 Einhorn's Galoshes(Heroic)
266 Intellect = 266PP
191 Haste = 95.5PP
171 Mastery = 64.98PP
40int+10Haste Socket Bonus = 45PP
471.48PP Total Value
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#2 Einhorn's Galoshes
233 Intellect = 233PP
169 Haste = 84.5PP
149 Mastery = 56.62PP
40int+10Haste Socket Bonus = 45PP
419.12PP Total Value
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#3 Desert Walker Sandals/Melodious Slippers
233 Intellect = 233PP
169 Hit/Spirit = 62.53PP
149 Haste = 74.5PP
40Int+No socket Bonus = 40PP
410.03PP Total Value
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Rings
#1 Signet of the Fifth Circle(Heroic)
215 Intellect = 215PP
143 Haste = 71.5PP
143 Mastery = 54.34PP
340.84PP Total Value
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#2 Security Measure Alpha(Heroic)
215 Intellect = 215PP
143 Spirit = 52.91PP
143 Crit = 57.2PP
325.11PP Total Value
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#3 Band of Secret Names
190 Intellect = 190PP
127 Haste = 63.5PP
127 Crit = 50.8PP
304.3PP Total Value
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#4 Signet of the Fifth Circle/Ring of the Boy Emperor
190 Intellect = 190PP
127 Haste = 63.5PP
127 Mastery = 48.26PP
301.76PP Total Value
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#5 Security Measure Alpha
190 Intellect = 190PP
127 Spirit = 46.99
127 Crit = 50.8
287.79PP Total Value
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#6 Signet of the High Arcanist Savor
190 Intellect = 190PP
121 Hit = 44.77PP
131 Crit = 52.4PP
287.17PP Total Value
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Weapon
#1 Twilight's Hammer(Heroic)
165 Intellect = 165PP
110 Crit = 44PP
110 Haste = 55PP
2207 Spell Power = 1743.53PP
2007.53PP Total Value
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#2 Incineratus(Heroic)
165 Intellect = 165PP
110 Haste = 55PP
110 Mastery = 41.8PP
2207 Spell Power = 1743.53PP
2005.33PP Total value
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#3 Blade of the Witching Hour(Heroic)
165 Intellect = 165PP
110 Crit = 44PP
110 Mastery = 41.8PP
2207 Spell Power = 1743.53PP
1994.33PP Total Value
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#4 Twilight's Hammer
146 Intellect = 146PP
97 Crit = 38.8PP
97 Haste = 48.5PP
1954 Spell Power = 1543.66PP
1776.96PP Total value
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#5 Incineratus
146 Intellect = 146PP
97 Mastery = 36.86PP
97 Haste = 48.5PP
1954 Spell Power = 1543.66PP
1775.02PP Total Value
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#6 Blade of the Witching Hour
146 Intellect = 146PP
97 Crit = 38.8PP
97 Mastery = 36.86PP
1954 Spell Power = 1543.66PP
1765.32PP Total Value
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Off Hands
As far as Off Hands go there are only 2 to choose from and the Winner is Book of Binding Will, hands down. No Contest.

Wands
Both wands are EXACTLY the same for Shadow Priest Values

Staffs
Staffs are now where as good as MH/OH, so I'm not gonna bother with this one. But I will if the requests are heavy enough.