I have a kindle 3G, I moved over to a Kindle from a Sony ereader. We can't get the Nook in the UK. I loved my Sony ereader but much prefer my Kindle. I have over 800 stories on my Kindle, around 200 of them are books I bought from Amazon, and the rest are fan fiction stories. I use Calibre to convert non DRM epubs, RTF(rich text font) and PDFs to MOBI format, and transfer them to the kindle. No the Kindle does not read Calibre tags, but you can set up Collections on the Kindle once the books are on there. You can surf the web with a kindle 3G but it isn't very user friendly, and tbh I don't bother. I did like my Sony ereader but having a Kindle means I can combine my fan fiction reading with books from Amazon.