I just ordered a i86 HDML Plus from ereader-store, so waiting and very excited for it to arrive
All the reviews I've seen so far of i86 HDML (you can kinda ignore the original/prototype i86 reviews, that was not ready) are great!! Fast page turns, very high resolution, Android apps, etc.
And I like Onyx Boox for their wide functionality and format support (Kindle, Kobo etc. have just as good hardware, but software/functionality very limited).
The only real gripe people seem to have is the front light being uneven.
Will see once I get it, but to be fair I didn't see too many complaints about the early kindles/ereaders with front lights being uneven until the later smoother ones came out (e.g. Paperwhite).
And I don't see myself reading in the dark... if anything I would just turn on the front light a little bit to make the background look whiter (although I'm still fine with E-ink Pearl displays with no added lighting).