hi i'll be getting my MBP like in hours, and i still didn't decide which macbook pro i have to get: 13'' 2.66 Ghz C2D or 15'' 2.4 Ghz i5 ? i'll be using it for college as a computer science student...! so does the speed and the screen size matters ?! please help me out with the decision before getting the mac and regret my decision. thank you 