What about a netbook or DVD player?
If you're not interested in the touch capabilities of the hardware, I don't really see a reason in getting a tablet.
If you just want a portable browser/ book reader, why not get an iTouch? Its significantly smaller, yes, but when in landscape mode, I find its not too bad. And despite people calling it the "Useless iphone without a phone," its got a pretty nifty battery life without having to wait for calls. I dunno if there's a droid equivelent- smaller would just be much cheaper.
If you do want the touch what-nots, I suggest shopping around at Monoprice. [http://www.monoprice.com/products/subdepartment.asp?c_id=108&cp_id=10841]
The prices are incredible. Hardware wise, it lacks some buttons 'n such, but its sturdy, and the performance is good. And its less than $40 for an 8x6 tablet.
I've been very satisfied with my tablet; the only downside is that it doesn't handle two monitors being used simultaneously very well.