For college? 13" Air, upgraded to 8GB ram. Fast, light, good battery life, and reliable. Plus a heck of a lot cheaper than the rMBP. Should chew through whatever work college throws at you without any issues at all, and they're great laptops besides.
The rMBP is complete overkill for college, IMHO. It's a great machine, but you can handle the work with an Air, and have enough left over to furnish your dorm room with a nice HDTV and sound system. You'll get a LOT more enjoyment out of that in your college stay
I see where you're coming from but I don't live at university. I live at home.