+ All the votes for the DX. Apart from having to replace the battery (and having the ability to do so.), it has been the most trouble free electronic device I have ever owned. I love the screen size, and I can read textbooks, and code at the same time etc. It has niggles (PDF viewing being a bete noire), but it's reliable, coupled with Calibre I can read anything, it hsa handled my lazy attitdue to device care admirably.