I play CoD4 a lot and I have a first gen. Mac Pro with an 8800GT installed in slot 1 (for 16x performance) and CoD4 just doesn't run that well. I have "Sync Every Frame" turned on because I hate horizontal tearing and I get 40-60fps most of the time but it even drops down to 30-35fps in places. Almost every map runs like this and this game is like 100x better in Windows on the SAME MACHINE. I don't really feel like always booting into Windows to play a game. Also, I have every graphical special effect turned off (ie: Shadows and Specular Map). However, in Windows, I can leave both of those options on and still get a constant 60fps EVERYWHERE in almost EVERY map. So my question is... how much money do I have to spend to get that same experience in Mac OS X? I thought the 8800GT would be great, but it's not. Does anyone here play CoD4 and have an ATI Radeon 4870? If so, what do you get for framerates? Please help me out. I hate Windows and I'd rather not use it.