Legitimate advice: I'm in a business program at cornell, and here's the deal:
BUSINESS RUNS ON PCS. Depending on the program you're in (ie, legitimately good business program vs.something not serious), you will constantly be trying to compensate for the fact that you own a MAC instead of a PC. Look at course requirements--if there is any type of mandatory computing class, like i had, i would recommend against the mac. The "office" for the mac OS is NOT the same as the windows version. Once you actually learn how to use excel, you'll realize the mac version is 100% less powerful, and you will need to run parallels.
SO, if you plan on taking excel-heavy business computing classes, do yourself a favor and avoid the slew of troubles you will put yourself through by owning a mac. Anyway, once you graduate and start working, you'll be expected to know how to use Windows..not the MAC OSX. But if you REALLY want the macbook, it IS possible to own and succeed using one...just be ready for some annoying ass formatting, and document compatibility issues. and last thing..have you checked the school's suggestions? i know for me they blatantly said if you're entering a business program...don't buy a mac.