Hey SimonSays: I don't own the PRS-300, but I hear it's r
eally, really nice. I definitely considered getting one as a backup to my PRS-600 (which I
adore). I went with an Astak to change things up a bit. (Plus, how can you
not be curious about Astak devices when confronted with the fanatical enthusiasm displayed on this forum?

)
My Slate Blue PP is due to arrive tomorrow (yay!) after which I'll be better able to comment about it.
pilotbob: While I tend to agree with you on the MP3 player angle, I suggest that formats
can matter, amongst many, many other factors. It all depends on the user, n'est-ce pas?
Being able to order a book from Amazon and start reading it when you're riding the bus home from work is very, very cool. But as I'm mostly interested in reading work-related materials in PDF, along with the thousands of classic, public domain titles that are available, the Kindles don't have as much appeal for me. I bought the PRS-600 because it accommodates both these needs extremely well.
For now, if I want to buy a book, some tree's gonna take a hit. I would also argue that the overall reading experience matters. Things as simple as how to turn pages, bookmark, screen quality (glare, contrast, etc.) all contribute. I don't know how the Astak compares as I've never seen one in person. But I suspect there are going to be things about it that I will like that the Sony doesn't offer, and vice versa. I predict it will be a lot of fun owning both.
There's always going to be a "better reader" out there, if one is willing to pay for it. That's why it's a good idea to appreciate what we have, until we're in a position to make a change. No sense getting anxious about it. (Although I know SimonSays was just being playful!)
Enjoy!