I meant all the games I tried are in osx. Nvidia didn't reccomend a dual boot system (plus I don't have a copy of windows offhand anyway). All the games I have tried experienced some horizontal tearing to a degree, except Lego Star Wars 2. That seemed to work fine for the duration I've played it. The halo universal binary experienced some tearing, with doom 3 and quake 4 displaying noticeably more. Prey was probably the worst with tearing. Vsync didn't help prey or one of the other ones that had it ( I can't remember which). I'm not sure if it's because they are universal binaries or demos or if it's the hardware. Would an intel only game run better? I'd try it if someone could steer me in the direction of a demo or something.
Apple gave me a care specialist when I was having problems with the first mbp..that had a permanent tear for everything, gaming or not ( hard to explain). Anyway, when I experienced the tearing during these games I asked her if it was a driver issue and inquired about gaming but she really didn't have the slightest clue. I appreciate the help you all can provide.