i am going to be a freshman in college this september and i am in the market for a MBP. some issues i have are these should i get the 15" or 17"? what are the pro's - con's? is the high def screen worth it? should i get the glossy or matte screen? i hate glare, but i watch movies often! i also do video editing. im waiting until july to buy it. are there usually sales that go on in the summer? also whats the best carrying case for a 15" or 17"? thanks for all the advice!