No one will ever get my K1 from me now. The K2 has slightly lighter print. That would be very bad for me as I have some vision problems. The next page button is harder to push. Some people may like this, but I don't. I like that I can easily flick my finger and change a page. That is, however, not the big problem. The lighter print would be a big problem for me. I assumed I would pass on the K2 but get the K3. Now I even doubt that. The most important thing is readability. It seems to me that K1 wins on readability, and that's the whole purpose of the ebook reader.
Steve
Steve