Macbook Air or nah Scene: I'm going into senior year of high school next year and figured getting an upgrade on my 5 year old laptop would be a good idea because of the computer science courses I'm taking this year. Should I get a Macbook, get a PC, or persist with my current laptop? I have a Toshiba Satellite C655. Any laptop I might get would obviously be used through college as well. Also, is an 11" screen too small?