If you're interested in large e-readers, the Onyx Max might be worth considering:
http://www.mobileread.com/forums/showthread.php?t=267140I'm a step a way from ordering one -- highly recommend checking out the content of that thread.
On a side note, if interested in the one with the campaign, looking at pages 18 through 20 or so of the aforementioned thread could be of interest.
Ah, also, IIUC, one of the participating members of that thread may be posting a review of a preview unit before long. I'm not confident but I think the person runs:
http://the-digital-reader.com/