Right now I'm running on my MacBook (not pro) 2.4GHz and I've loaded it up with 4 gigs of Ram and its lasted me a year (so far) of Uni. Excellent computer, can't beat the affordability. However I do have a suggestion for you, or rather information for you to make your judgment on.
Mac pros have better graphics, they have an actual graphics card whereas the MacBooks do not (they have integrated graphics). I've tried gaming on my boot camp partition (with games such as Combat arms, Alien vs Predator [ancient game], and AoE) and I have had trouble with combat arms being a first person shooter and demanding a lot of graphics attention, my mac would heat up and eventually die (blue screen of doom) and it would reset.
If you need the graphics and have the money, go for it. Pros are excellent. But if you want to save some money and aren't worried about intensive gaming, MacBooks are just peachy for school (movies work great too!).
Enjoy your hunting!
Cheers.