I have the 13" macbook pro since the 14th of June this year, so a couple days ago. I'm going to be studying and majoring animation design in college. I'm kinda regretting, not regretting, kinda confused if I should get the 15" macbook pro? Or it's fine with the 13" ? My parents have the imac 24" screen. I don't knwo which to choose. If I should return this and get an exchange for the 15"? And I have student discount, how much difference would I have ot pay left exchange this 13" to a 15"? Advice?