Get a Lenovo ThinkPad. They're extremely durable (very high build quality), have great battery life, and will last you for all 4 years of undergrad (and most likely beyond that). The
R series starts at $650, the
T series at $750, and the
X series at $1000. I have a T400, and it's the best laptop I've ever used (better than Dells, HPs, Sony's, Macs, etc.).