The processor i listed is pretty god, and can be overclocked a lot too if you ever want to do that.
Graphics is a bit weak, which is why i suggest spending more to get something better. For WoW its more than enough really, and if you just want to play without too much care about max settings then it should do you i think.
Mobo again is not top quality, you would need to check that the stock bios supports the CPU too, best way is to call OCUK directly and ask them.
Really, at these price points you cant get something much better though. its all about the budget.