Hi!!! I wanna buy a new pc for games and i have a few questions: I'm thinking of getting 4gb ram, is it worth it or should i just get 2gb and save some money?? Also, if i get 4gb then i need Vista, and i've read that XP is much better for games then Vista is, so which do you guys think its best, 2gb XP or 4gb Vista???? Thanks!