Buying my 3rd e-reader.

Alright, I have once again started reading. Right now I have a PocketBook Pro 603. Still functioning perfectly, but a bit slow in page turning and sometimes I have to go back a page because there is to much ghosting.

So I am looking for a new e-reader.

I have some requirements for it beforehand:
At least 6,8", preferably a bit larger.
Less than 10".
Illumination (preferably with a night mode/rgb)
No vendor lock in (must read epub, mobi, etc.) and no ADS! I buy my e-books, usually in a drm-less version. I want it to be "mine" and not "licenced" by some company.
Must be compatible with Calibre.

Also important: as close to a real book as possible.
The text should be as close to the surface as possible, just like real ink. If possible no "indented" bezel.
Buttons. I don't have experience with the latest touchscreens on e-readers, but I like to read one handed. Unless a small "thumb swipe" will work I need buttons for it :)

I don't need internet access, apps, games, etc. No problem if it's there, but don't need it.

Right now I am looking at the following:
Onyx Books N96 (which model?)
Kobo Aura one.

But I think I am missing lot's. Any help appreciated!