I just picked up a Nexus 7 16gb (1st generation 2012 model) during the black friday madness (I shopped online. I would never go out on that day.) I was able to snag it for $114. I wasn't planning on picking up a tablet at this point, but I couldn't resist that price for a quality piece of hardware. I think it's pretty great so far.
The 7" size is perfect for reading, I think. I did want the Kindle PaperWhite for reading books, but now I don't think I'll have much issue reading on a regular screen. I also like running pure android rather than the modified versions you might get on other devices, so that's a plus.
A lot of these electronics sites have had some good sales for the past few weeks. I'd keep an eye out for those. Amazon also had some good sales on the Kindle Fire HDX too which seems comparable to the N7 2013 model stats wise. Though you'd have to deal with Amazon's Fire OS fork of Android.
(And of course I'd stay away from the overpriced iPad unless you're just made of money.