My main has always been casters and I have a 70 mage, an 80 mage and an 80 Warlock and recently i decided to start an Spriest myself and he is level 73 at the moment. I have no concern about PvP and i dont really like it very much and am going to PvE with my priest. So far Spriests have been a lot of fun, and i cant wait till i get mind sear XD! In my opinion play one, but if its for PvP even i wouldn't recommend one. But for PvE, they are pretty fun, and its always fun seeing all the green, blue and yellow numbers on your screen XD!!