I'm going back to school after getting a J.D. to get a B.S./M.S. in Electrical Engineering. I have a 2007 Black MacBook that I love but it's starting to wear out. I'm pretty sure that using it every day and all the dog hair in the keyboard have pushed it to it's limits. I'm looking at the 13" and 15" MBP as the most likely candidates. I know that I'll be doing most of my "intense" coding/math crunching/design work on school computers and I'm pretty sure I won't be taking notes on the laptop since diagrams and such are so difficult to do. So I guess this will be used for homework, projects, papers, etc. I'm a fairly short girl and so I kinda feel like the 15" will weigh me down too much and is just too much screen real estate for me. So my question really is, will the 13" have enough power?