Whats the best college pick between the 2 macbook pros? 15 in or 17 in? i love the new batter life on the 17 and i was able to price each one out the same so its a matter of picking one. 15in i get teh 2.8 ghz for the same money as the 17 with 2.66 but i dont think that will make much of a difference for me. yet the 17 might be too big for college for my desk in class or seeing my professor over the screen. what do you guys think? thanks alot!