Hello Slider, and welcome to the forums first of all, and you've come to the right place
Having a BeBook it would come natural to me to recommend that, right? Wrong.
I would buy a Cybook if I had ordered one today. Simply because the Cybook's implementation of Mobi support is way better than BeBook/Hanlins currently is. The cons of Bebook mobi support is:
1) It does NOT support dictionary lookup from within another book, this will be released at a later date, we do however not know when this will be released or if at all.
2) BeBook's mobipocket reader does NOT support changing of fonts, they supply Arial, Times New Roman and the systems lBook font. And alla of these are evil fonts that shouldnt be used IMHO.
I also have a bit of problems with the fact that when I read a mobipocket book on the BeBook, it looks like it's using doublespacing between lines, that might however be a setting somewhere that I am not aware of.
And there is also the price issue, at £179, the Cybook is a bargain compared to the BeBook as far as I am concerned.