Wow! I didn't expect such a rapid and excellent set of responses. Even some facts.

everyone.
OK - I'll put my cards on the table: I'm deeply attracted to the Sony PRS-600, because
- a 6" screen seems about right
- overall size & weight is good
- it supports a fair range of formats
- it has annotation & search facilities
- it is compatible with Mac, and, I'll be honest
- the design is beautiful.
It's about the most expensive I could afford, though I can see that I might in time be tempted to add the cover with a built-in light.
So I've been trying to convince myself that the common complaint about lack of screen contrast could work to my advantage

(I plan to use it for reading novels).
Igorsk - thank you so much for your kind offer! Liège is a bit far but if I get any more conflustered I
might take you up on it.
Off to brood about the whole issue for a bit.