I was hoping for a high resolution screen, so would be looking at a Wexler Flex One or a PAGEone HD as alternatives (though I've yet to see either on sale as yet). (I know the iriver Story HD is also out there -- but I don't really see the point of a keyboard on an eReader.)
How bad are the i62HD's buttons? I found the page-turn buttons on the PB360 to be so large, stiff & ill-positioned as to be unusable, so have used the D-Pad (itself rather stiff) for page turning --with the result that my thumbnail has now worn a deep notch in that side of the D-Pad and that side of it now 'squelches' rather than clicks when pushed. I don't mind a 'firm' push, but would prefer something that didn't require either two hands or finger-gymnastics to press.
I had assumed that, even with a touchscreen, I'd use a physical button for page-turning (99% of the interaction with an e-Reader). Should I be thinking about simply using the touchscreen for everything?
I agree with you about FBreader -- it was my favorite e-Reading software even on the desktop and a big selling feature for buying the PB360. It meant that I was able to very quickly get settings that I was completely comfortable with (and so haven't needed to change since).