yes you can using calibre e-book manager (even books you've gotten abit naughtily)

I have copied about 20 books to mine and have currently read 1 book. No hassles, no gimmicks, just book reading.
Well pleased with mine, got a nice case for it for a fiver too. If you need links, pm me.

I have the new kindle 4.

I'm actually debating getting a kindle fire... though it might be abit of a pain having to convert epub books. :/

Why would you need to convert epub books? All books are available in the epub format used in the Kobo.

i would get a tablet, cuz they are readers and much more
unless u just want to read...which is dumb lol