knowing everything about computers, i feel i am authorized to give you the response you need.
i did my first year of school with a powerbook and my second with a macbook. a macbook pro is definitely overkill. it's great, but overkill. windows sucks, but everything is power point, so you can either 1) run powerpoint for mac 2) run keynote for mac 3)run windows through parallels on a mac or 4)use windows.
ranked, those options are: 2, 3, 1, 4.
tablets are OK, but you have to convert your files for One Note or whatever that program is. just learn to type and you'll be fine.
if you come to scholl, i'll give you parallels for free and you can have either vista or XP.
if you're a long time mac user, notice that the difference between a MacBook and a Macbook Pro is much less than the difference between a Powerbook and iBook was.