[Boston]

I bought a K1 for my mom 3 years ago and she loves it. She still loves her K1 but it's gone threw 2 battery replacements and needed a couple of resets in the past few months. So I'm thinking it's time to get it replaced.

Over the years, I've tried buying her other readers (including Jetbook, PRS-650, etc..) for ePub but she will try them for a month or two and always go back to her Kindle.

1) Needs to be an Amazon device...We share an account/books. I buy the books and she likes that all she has to do is turn on the wireless for them to download. Plus their customer service is excellent for step-by-step troubleshooting (she had problems with her Sony and ended up mailing it to me because their customer service had her so confused)
2) She doesn't use or need the alpha/num keyboard..she just reads books on it.
3) She has a PRS-650 which I loaded books on for her. While she uses it occasionally, she never got use to the page turns...says she goes the wrong direction and jumps pages. So I think touchscreen is out.
4) I don't think it needs to be 3G as long as I can set it up for her wireless home network and forget it. (Troubleshooting that stuff is out of the question for her)
5) Anything that has to be hooked up to a PC is out.
6) On the same vein - it needs to be very simple to navigate and problem free. She is in her late 70s and her only use of a computer is email (which still generates calls whenever there is a problem).

It seems that of the models available, my choices are a K3 or K4. Leaning towards a K4 but wondering if she would miss the side page turn keys (I think I would). New K3's seem comparably over priced and given she is an avid reader (book a day), am reluctant to buy used because the battery is not replaceable.

Looking for thoughts from K4/K3 owners especially from those who have owned both or upgraded from a K1.