Hi, I have the 2.4Ghz/2GB DDR3/250GB HDD stock UMBP, I was wondering what the best OS is for me if all I'm going to do with that bootcamp partition is gaming. I plan to play games like Call of Duty 4 level--not crysis intensity, lol. What OS should I use for my bootcamp partition? Is Vista Ultimate a god choice? What about Windows 7? XP? I want to squeeze every frame possible, lol... Also, how much HDD space should I allocate to my bootcamp?