What games are you usually playing chaosdsm?
Currently installed & played (at 1920x1200) within the last month: Skyrim, Deus Ex: Human Revolution, Diablo III, Battlefield 3, Batman: Arkham City, and Dragon Age II. Just finished DE:HR (2nd time around) & mostly Playing Skyrim right now & looking hard at Far Cry 3 as my potential next game.
BTW... Gaming resolution should also be considered when weighing the purchase options. The memory bus on the 660Ti favors 2.07MP (1920x1080) or lower resolutions, while the wider memory bus on the Radeon favors higher resolutions. So even in games where an overclocked 660Ti at 1680x1050 can match blows with the reference 7970 (Dragon Age II for example which loves nVidia cards) and runs about 18% faster than the reference 7950, at 2560x1600 that 7950 closes that gap to just 10%.