Considering all I read and all your feedback I am thinking about buying a Nook simple touch and root it (like this
http://www.the-ebook-reader.com/nook-touch-root.html). That should give me all I want: External keyboard, Notepad, vokab trainer, saving websites for offline reading (opera mini browser).
Slight disadvantages compared to paperwhite:
- 2 GB (Kindle PW: 4GB), on the other side you can extend the nook with a memory card.
- more prone to bugs probably compared to the kindle that seems to work very smooth (source various video test I have seen; see this one as an example
https://www.youtube.com/watch?v=vWBGJ7_QbMs).
- no light to read in the dark!!