Hi I need help deciding whether I should buy the 15 inch or the 13 inch. I currently have a 2012 11 inch macbook air and I want to upgrade to a bigger screen. I was going to buy the 15 inch base but looking at the prices I can get the 13 inch for it makes it difficult to choose. 15 inch is 1699 while I can get the 13 inch in the 900s. I'm a college student. I don't edit or do any demanding tasks at least not yet.