I got my prs 950 these days, I'd say I love it.

The pdf and epub reading experience on prs 950 can blow kindle away, especially my kindle Dx1. But lacking some feature lowered its c/p. If the next firmware can support following features, to me prs 950 would be the best ereader for reading:
1. Improve the accuracy of writing text. Now the pen is nearly no use, it is very hard to write a note due to the inaccuracy of touch screen. Except for improving accuracy, another simpler way is enlarging the inputing area when user is writing.
2. Rotate web browser when surfing web. I much like the the web browser on e-ink ( I do hope to get ride of LCD after work). It can nearly open all the web page. But it's too strange it cant rotate to 1024px width for reading, this erased half value of the browser. Don't know if this is purposely, since it seems simple to enable it. I really hope the next firmware can allow rotating browser.
3. Unicode support. Actually I think this should be a standard feature for any ereader now days. But its priority is lower since there are hacking for fonts.