So I'm a high school senior, going to university next year to study electrical engineering. I currently have a 2010 15" MacBook Pro, which rarely leaves my desk at home. I also have a custom built desktop that is MUCH more powerful that the MacBook and I much rather bring that to university than the MacBook. So I'm thinking of selling my MacBook and buying either a MacBook Air or Maybe 13" Pro with Retina Display. What is your suggestion?