What you want is:
1 - a Motion slate tabletpc
2 - Sahara slate tabletpc
And if it even as nothing to do with it, one can see them on TV series: CSI NY (1) and Stargate Atlantis (2).
You get also the computer you will need for your studies and plus the possibility to take your course notes on them = one machine covers it all.
I use tabletpc’s in my business, meetings, classes I assist and classes I teach since 2003… also I’m writing this post in one - the Toshiba M200, kicking 365 days per year since early 2005 and still strong!