Thanks for the welcomes. I've done a lot of reading in this forum and the wiki. Thank you, Patricia, for emphasizing the point about annotation and underlining.
As an experiment, I tried searching several recent titles in philosophy in Amazon' Kindle store. I came up with nothing. I don't know if I'd have better luck elsewhere.
I saw my first physical reader today, in a Target, a Sony PRS 505. I was impressed with the eInk display. I later saw a PRS 700 in Borders--not so impressed.