Hi! I am going to be getting a new macbook pro for college. I already have a macbook (white) that I really like, so i'm excited to upgrade. Two questions. I am happy right now with my 13 inch, however, I am looking at getting a 15 inch to upgrade for the macbook pro for grad school. which screen is better? the 15 or the 13? also, which screen is better -the matte or high res? I get headaches pretty easily - does anyone have any personal experience for this? i mean i'm not a graphic artist. but i do want the best screen possible as i plan on spending a lot of time behind it. also - i am torn between getting a 15 inch pro 2.4 with the i5 or a 13 inch pro with the duo core. right now mine is a 2 Ghz intel core 2 duo with 2 gb 667 mhz ddr2 sdram. i would like it to be at least as fast if not faster / better than my current model. i know very little about computers - and i know i got a steal on my first macbook. so i want whatever i get for this model to be faster than my first one. thank you!!!!!!!