I can only comment about the kindle fire, which I'm using now. Had it nearly year and it does everything I need; books, Internet browsing, a couple of game apps, films and a bit more. Down side, no upgrading memory size. Mine crashed on Sunday by either wife or kids messing with it or the memory was full and it had a wobble. I lost all my saved music, photos, and videos that I'd loaded my self. All the books bought from Amazon were fine as they are stored in the magic cloud in the sky.
If I was to look again, I would probably get a hudl as that is HD, camera and you can add memory; and then a add the kindle app.
All the best.
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