I will be purchasing my first macbook soon, but I am not sure how much extra ram to get. I will be purchasing it from another site other than apple since it is much cheaper. I will be going to college next year and majoring in either computer science or business, and mostly I will be doing things like making websites, some photoshop, a few games, watching DVDs, that sort of thing. Will 2GB be enough for me or should I go for the 4GB?