so i guess this has been asked hundreds of time before, but when i looked at those thread there are no definite answer yet , so here i go i just bough uMBP 15" 2.66mhz with nvidia 9600GT 256MB and im planning to use boot camp+ window to play games, like NBA live2K10, pro evolution soccer and such. now, ive research abit and found its better for me to use window 7. the question is , which version? 32 bit or 64 bit ? i have 4gb of ram if that matter. can somebody tell me the pro and con of both ? thank you very much.