Just a comment on the DX for general reading. I love mine since I prefer not reading on a 6" screen. We have 2 regular Kindles but they see little usage anymore. Too many page turns for my taste, too much like reading one of those "Big Little Books" that I had growing up. I love the full size screen and simply don't have an issue carrying it when I go somewhere. No subway, so I basically carry it out to the car and from the car to where I'm going. Not a big deal.
I've wanted a DX long before I ever got a Kindle, but refused to pay the ridiculous prices that were asked. When they went on sale some time back I snatched one up, and use it constantly. I thought it would be kind of a pain since it doesn't have Wi-Fi for library books, but the upside is I don't have to worry about my overdue books going away until I'm done. And it turns out to be pretty much a non-issue. Hook up the USB cable and download directly to the DX.
In short, I love my DX. Just remember: "Size Matters".
