i dual boot. having OSX/Windows on a computer comes in handy especially because some professors at pitt refuse to make things "mac friendly.
honestly if i had to do it all over again, i'd buy a mac. anytime i have a problem, i just run up to the store and get it looked at...no tedious phone calls with people halfway across the world. plus it holds up really well, the aluminum body is way better than plastic crap.