Thank you very much for your replies!
Indeed I researched into the Kobo & Tolino and found that many users found the Tolino laggy and gets less good updates than the Kobo (even though hardware is similar).
Also, some say hardware from Kobo is slightly better, feels "less cheap".
So I want to go for Kobo, since I am a total computer beginner (I even struggle with simple Calibre tasks) and can never in a 100 years hack the Tolino to become a Kobo.
The 8" looks nice, but too large for my user case, so the Epos 3 and Sage are too large for me. 6" too small.
So the result is:
- Kobo Libra 2 not available any more
- Tolino software not good enough
- Pocket Era seems to be the deal (although worse display contrast + some say laggy software)
I think I will trigger the PocketBook Era and return, if contrast is too unpleasant and software too laggy.
Or try 8" devices (Sage, Epos) anyway and start weight lifting so I can hold the heavier 8" device longer in my hand.
Thank you!