Just jumped into this scene with one each for the wife and me. I did the research so I went with the Nook Tablet, mostly because I could add memory.
Funny thought/rememberance. When I went to work for Amoco we had the second largest computer system in the US only behind the DoD. I can, and did, put put more memory in one Nook than the 500K sq ft building I worked in could have held. And at less than 1$ per gig for two 32 gig cards, back then the disk drives were something like $1000 per kilobyte. Times have changed a "bit".