Ask Engadget: Best tablets for students?

We know you've got questions, and if you're brave enough to ask the world for answers, here's the outlet to do so. This week's Ask Engadget inquiry is from a pair of guys called Joe on opposite sides of the planet that both need a tablet-based solution for their higher education woes. If you're looking to send in an inquiry of your own, drop us a line at ask [at] engadget [dawt] com.

Joe from New Zealand writes:

I'm a second-year university student with a health issue that means I can't carry round heavy textbooks. I've been looking at tablets that I can use as a replacement for textbooks and paper notes. I think I need a tablet, pen and software combo that'll let me read, edit and annotate ebooks, PDFs and PowerPoints, have a day-long battery life, display A4 sheets and a camera that can take pictures of textbook pages -- but I've only got a budget of $600. Thanks!

Joe from America writes:

I'm enrolled in a class where my professor won't post his power points and talks too fast to handwrite notes. I'd type on a laptop, but I don't wanna be that guy. Is there a physical keyboard that's silent, or an on-screen keyboard that'll work as well as a real one?

Our thoughts skipped to the solid if underwhelming ThinkPad Tablet, which has a stylus input, decent camera and eight hour battery life. If you could get it to play nicely with Thanko's Silent EX keyboard, then both Joes would be happy -- but what do we know? They asked us so we could ask you guys, share your wisdom in the comments below.