If you're going to be typing a lot, I'd buy a convertible, personally. Maybe something like the Sony Vaio Duo 13? http://www.engadget.com/2013/06/04/s...duo-13-review/
Edit - Actually, no, I changed my mind. If you're just typing simple notes and stuff, a stylus equipped tablet with a bluetooth keyboard should be fine. Samsung has its Galaxy Note tablet range, and there's a ton of Atom equipped Windows 8 tablets with stylus support. Either would work.