Figured I'd throw this in a new comment as well (in case you skip over it not noticing the changes I added)
A note on the ArP vs Agi argument, Look at
www.femaledwarf.com, it's a fairly easy to use spreadsheet. Lining your gear up with the best of all possible raid buffs/debuffs it comes out
ArP (current Setup) - 9020 dps (stat weights Agi - 1.715, ArP - 1.633)
Agi gems - 9053 dps (stat weights Agi - 1.618, ArP - 1.525)
What this means is that for your gear level Agi is worth more to you than ArP. Now it doesn't look like a big difference in terms of numbers, however remember achieving the ArP number is very much tied to being able to stand still the entire fight, any time you start moving your ArP number will drop substantially more than the Agi numbers.