I have never, ever, regreted my decision to go for the Cybook. On the contrary: I still find it the more balanced e-reader out there. It works fine (it crashes very few times now, under build 802 - the one I got after I sent it to repair due to a SD card problem), and it is an wonderfull e-book reader - but then, that's all I really want it to be, an eBOOK reader...
And also think you will not find anything on the market substancially diferent from the Cybook - only, I repeat, a little bit worst...
You should consider that PDF is just a terrible format to any relatively small screen.
I understand, however, you concern about firmware upgrades and support.
As far as I can tell, Bookeen as always been very supporting and responsive to my requests (again, my Cybook had a SD card problem, and it was replace in a few days).
I also expect a firmware upgrade in a few weeks (maybe even days...). But then, I am an optimist guy...
Anyway, it WILL come. And it WILL be a major firmware upgrade (please, don't flame me if it isn't...)
Regards
Nelson