Im planning to buy a Macbook Pro, for school but can't really decide yet which one to buy. I'm afraid 15" is going to be heavy because I have to carry it to school everyday and im only 5"00 and 80 pounds for eight grade. Help me decide? I don't mind prices, able to afford but only about the weight and the everyday carrying thats all. Or the 15" inches' great functions is worth carrying everyday??? Thanks !!!!