Which version of Microsoft Office should i get?

Heres the deal. I am a student in college and i need to buy office for my laptop. I got a brochure from my schools bookstore and it has Office Proffesional Plus 2007 on the cover and its 80 dollars compared to the original 500. My other option is Office Enterprise 2007. that one is 60 dollars and originally is around 500 as well. they both have what i really need it for which is Word, Excel, and Powerpoint. I guess what im asking is which one is more beneficial?