I Just hitted 85 last night, i still have some T11 264 parts, some greens and some blues.
Have tryed Arcane and Fire, it seems that at this point Arcane is better if you know how manage the mana. However, i really dont like the Arcane Playstyle, i hope at more iLvl Fire, Frost or FFB became more powerfull since those specs are really really fun, i'm getting boring right now with Arcane, at the point that I'm about to switch to my paladin or my shaman. Let's give to the mage a few more tries :V