Well there are other options if you are not happy with your ereader. I alternate between my PRS-300 and Kobo. Now the Sony is a seriously nice piece of kit but it does have "niggles" I am using my Kobo a lot more now to read on.
Kobo are being smart. They own the lower end of the market with a simple, easy to use ereader that will allow purchases from a plethora of ebook retailers.
I was considering a K3 regardless of Amazon's walled garden approach and that hideous keyboard or the PRS-650 which in true Sony style is overpriced.
However now the Ko2 is out, then I am heading that way. Just the faster processor and quicker speed is a winner for me.