We are back to the old "want" versus "need" question, here. The MBP is a superb machine, and will - more than likely - give you several years of sturdy and hopefully reliable computing; I'm the very happy owner of a MBP, and it is by far the best computer I have ever had. It offers great performance, is powerful, aesthetically attractive, and has a superb screen.
The question is do you "need" it, or simply "want" it; if you need it, buy it now and avail of the educational discounts; if you simply want it, or are the type of person who must have the latest in technological advances, wait for the newer models to be unveiled; if you are not that bothered, but money is an issue, then I suggest that you wait for the updated new models, and buy one of the discontinued models, - assuming they are available - as the discounts are often quite generous. In the meantime, good luck and enjoy college. Cheers.