I appologize, I misread the intention of the thread. Sorry.
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* Decent size: iLiad or Astak (I dont know wether the 9,7'' Astak will be available today).
* Kindle ... as far as I know at least not legally
* Battery - yeah, thats where you are loosing the iLiad. My Sony lasts more then long enough (a couple of books) though, and I guess other Readers do as well
* Storage space - every reader I know supports some kind of card-interface - CF, SD, etc. Storage space shouldnt be a problem

* WiFi - iLiad, Astak, dont know if others support WiFi
* Font justification should AFAIK be possible on every device, or?