Hi Chocomoholic and welcome to MobileRead. I've had a 505 for two years now and love it.
Be sure and check out all our free books here Plus, with the Sony you can download eBooks from public libraries. You get to keep them for 21 days after which they disappear from your reader. In fact, I'm in Rio De Janeiro at the moment and borrowed a book from the Fairfax Va library the other day. Worked great. Check out our list of lending libraries here
https://wiki.mobileread.com/wiki/EBook_Lending_Libraries