I currently have a 2007 white MacBook. I am in the market for a new MacBook within the next several months for college. I am a casual gamer. I do not intend to be playing intense games on it. I have a ps3 and 360 for those. What I'm asking is, how well does the 13 inch MacBook pro (2.53 GHz, 4gb ram, 500 HDD) handle games like the Sims 3 or simple RTS games? Also, would there be a considerable performance difference in playing games in Windows 7 as opposed to OSX? And last but not least, should I hold out until the MacBook line recieves the core i5/i7's? How big of a difference will it make compared to the current processors? Thank you!