So I was bored at work the other day and started making a BiS list. Made a heroic and pre-heroic list, aiming the heroic list at getting the 4-set bonus, since I see the bonus as being quite helpful on many fights in Dragon Soul, while the pre-heroic list ignores set-bonuses.
Items that stay the same for both sets are marked with green. Haven't bothered with LFR gear, since it's of no use to me.
Pre-heroic:
Helm - Faceguard of Radiant Glory - Warmaster Blackhorn
Neck - Guardspike Choker - 1250 Valor Points
Shoulders - Brackenshell Shoulderplate - Morchok
Cloak - Indefatigable Greatcloak - 1250 Valor Points
Chest - Chestguard of Radiant Glory - Ultraxion
Wrist - Titanguard Wristplates - Crafted
Gloves - Gauntlets of Feathery Blows - 1650 Valor Points
Waist - Forgesmelter Waistplate - 1650 Valor Points
Legs - Foundations of Courage - Crafted
Boots - Stillheart Warboots - Ultraxion
Ring 1 - Signet of the Resolute - 1250 Valor Points
Ring 2 - Hardheart Ring - Shared boss loot
Trinket 1 - Indomitable Pride - Shared boss loot
Trinket 2 - Resolve of Undying - Madness of Deathwing
Weapon - Souldrinker - Madness of Deathwing
Shield - Blackhorn's Mighty Bulwark - Warmaster Blackhorn
Relic - Stoutheart Talisman - 700 Valor Points
Heroic:
Helm - Faceguard of Radiant Glory - Warmaster Blackhorn
Neck - Guardspike Choker - 1250 Valor Points
Shoulders - Brackenshell Shoulderplate - Morchok
Cloak - Indefatigable Greatcloak - 1250 Valor Points
Chest - Chestguard of Radiant Glory - Ultraxion
Wrist - Graveheart Bracers - Warlord Zon'ozz
Gloves - Handguards of Radiant Glory - Warlord Zon'ozz
Waist - Goriona's Collar - Warmaster Blackhorn
Legs - Legguards of Radiant Glory - Yor'sahj the Unsleeping
Boots - Stillheart Warboots - Ultraxion
Ring 1 - Signet of the Resolute - 1250 Valor Points
Ring 2 - Hardheart Ring - Shared boss loot
Trinket 1 - Indomitable Pride - Shared boss loot
Trinket 2 - Resolve of Undying - Madness of Deathwing
Weapon - Souldrinker - Madness of Deathwing
Shield - Blackhorn's Mighty Bulwark - Warmaster Blackhorn
Relic - Stoutheart Talisman - 700 Valor Points
Of course there will be fights where you might want to use a different setup of trinkets and such, and if you really want to whore your ilevel, I guess you could go for Curled Twillight Claw instead of the Valor Point ring.
Anyway, any comments or corrections are welcome.