I too love my shiny new red PRS-600 - the only adivice I'd offer someone newly purchasing the 600 is - to check it outside on a sunny day - with the sun shining on the screen - and see if you can read the "page" - mine suffers from disappearing ink. I can solve the issue by framing my face in front of the reader, but others don't suffer from the same issue. If the ereader has that issue, run back and exchange at your place of purchase. Other that than I have no complaints.
The cover that comes with the light - is another issue. I think it's rather cheaply made. It feels like cardboard BUT it's convenient...just way overpriced.
I'm excited to download library books which is why I purchased this ereader to begin with. We all get our joy from somewhere!