At a lower res you might, but why base your build on crysis? It seems like a decent build and if you are really interested playing crysis on a high res dump the sound card and upgrade to a 4870. I have the same motherboard as you and the onboard sound is pretty good.
If your main concern is WoW you would be better off going for the E8500 because your FPS is going to depend more on your CPU than your GPU and WoW will only be using two of your cores. I would check on WAR too because most MMO's are more CPU bound than GPU.