WoW a GTX 480 gets 31.3FPS while the dual Ares gets 71.1FPS, that's an extra 2,500$ for double the frames give or take. I say TRI-480's is a MUCH better buy @ 1,560$ as opposed to almost 3k for the dual Ares..
Horrible CF scaling IMO...
The GTX 480 gets 31.1 FPS @ 520.00$
The Ares gets 41.2 FPS @ 1,500$