Some of the reviews scare me about temperatures/failing/driver crashes. Noise isn't that big a deal since when I game with a headset and that + vent usually drown out the noise(my last comp was a little noisy). I just care about performance/temperatures.
I've owned 2 of the TFII/OC's and the HAWK which I put in a friend's build. Both OC like champs and do the job. If all you're playing is WoW then they are more than enough for the job. The Hawk I put in a friend's build runs his WoW at 1920x1080, everything on Ultra and maxed. The TFII's I let my other friend play with them a bit and he got them to 1000MHz stable each on air. You can't go wrong with either.