will have to wait and see what kind of screen they use. The PRS 505 was great I have one , but the 700's screen sucked. As far as the ebooks, I prefer to load mine on SD card then put them on reader. I don't like the idea of someone being able to mess with my books wirelessly. All the books I use are PDF, you can convert docs using OpenOffice; if some PDF are secured/locked, I use PDF-restriction remover, then I can edit Title and other tags with PDFinfo. Great programs and only 9.99 for one of them - the other is freeware.
You can find a lot of free ebooks online, just search for them...