Hello all, I'm starting my first year of college this upcoming semester and wanted to purchase a new MacBook Pro for classes to replace my old Powerbook G4. I've narrowed it down between the 13" and 15" models as I currently have a 17" laptop that I've found to be a bit cumbersome, but I won't be carrying it around too much, so portability isn't a very big problem. Price isn't really an issue, I just wanted to get some input from anyone else who already owns a 2011 Macbook Pro, which one do you personally think gives the best general performance for the price? I'm thinking about majoring in aeronautical engineering, but I won't be doing many intensive things like AutoCAD until possibly my third or fourth year. Would an upper-end 13" be able to handle this, or should I go with the 15" for these programs? I need something that would last me through and beyond college. Thanks in advance for your help!