Large screen, clear, simple.

My quest for a large screen replacement for a Kindle 4NT has been frustrating. What I am looking for:

-7" to 8" display preferred. Larger end of that the better.
-Very clear display (light background/dark text) when unlit
-Good font choices/adjustibility (weight and size like Kobo...not 2 or 3 choices like a Nook)
-Light must be able to turn totally off
-No difficult to source/support devices
-No asymmetric devices like Oasis and Forma
-If lit then no splotchy or uneven lights.

I use Calibre, don't care about book format as long as I can convert, do not use WiFi or stores on the device, don't sync or share. Simple is good and the display clarity/reading experience is all I really care about.

I am about to return a Kobo H202 as the display is just too dark. Nooks are too dark. Kindles I have seen are always in demo mode with light on 100% so cannot assesss but I do recall a Paperwhite 2 I tried a couple of years ago was much worse than the 4NT in clarity so I returned it. Basically I want a scaled up version of the 4NT display...anything like touch, lighting, features is a bonus.

Thanks for looking :)