So, I just purchased a new model Macbook Pro with the following specs: 15in screen, 2.8ghz, 4gb RAM, 320GB Hard Drive at 7200rpm, Nvidia GeForce 9600M GT with 512mb VRAM, and Nvidia GeForce 9400M. It is not exclusively a gaming machine, but I would like to do some gaming on it. I want to play some of the better recent games (Call of Duty 4 (and 5 when it comes out), Crysis, Bioshock, Mass Effect, World in Conflict, etc. and I am wondering how I can get the best performance possible. I am not expecting maxed settings at 60fps or anything, I just want to do the best I can. So, I have a couple of questions: -What version of Windows should I install in boot camp (XP with sp3 or Vista with sp1)? Windows will be used exclusively for gaming. I have heard XP is sometimes faster, but Vista can utilize both graphics chips and is better for DX10, which some games I will play will have. Any advice one way or the other? -If a game is available for both Mac and PC, which should I buy to get better performance, the Mac version or the windows version? An example would be COD4, which I have heard plays better on windows than Mac. Is this true always, sometimes, never, etc? Any other advice I am not thinking of/aware of would be greatly appreciated. Thanks a lot!