I got a Kobo, from WHsmith, light, good battery life, loads of books from Kobo. Lots of free books.
some people say it is a bit slow at changing pages, but I don't find it so. I got the Kobo because I could try it out in Smiths.
Back-lit is a bad idea for ebook readers as your eyes will strain, it will be like watching a computer monitor for a long time without a break.
E-ink is the best to go for.
Desktop machine now powered by windows 7 pro 64bit , laptop by ubuntu
On ADSL24 using C&W network.