I myself am going for either a 1 Priest 4 locks, or 5 priests, hard to decide.. both will have very nice new stuff.. priests have very nice healing with 5 priests if you want you can go disc/holy pvp or whatever you wish and hit like truck and heal very nice (Binding heal for example and whatnot alot of healing anyhow ).. Locks have sick damage(instant soulfire and Doomguard and cool stuff) and moderate selfhealing add a priest to that and you have a scary team..

Read up on the class changes if you havent(bet you have)

Zool