i don't see how that makes any differance? (9/10 times people here buy stuff with their own money, the other 1/10 feel free to pm me for donations )
also the reason ati is a likely card of choice for the OP is because of his budget.
Not because it will offer him the better performance (certainly not for wow)
also those links provided illustrate that even better with gtx 670 being even on par with a 7970....... (and 660ti eats equivelant ati card +1 even)