Was walking by the SonyStyle store, gave up, went in and ended up buying one... I'm pretty horrible that way
The screen is better, and much much faster in page turning. I like the new look, but am kinda worried about the SD/MS slots on top, they aren't really covered up by anything, and I fear an impact could turn the cards into projectiles.
The reader feels more solid, they went for a more "flat" design I suppose, instead of the curves on the older one, and I think I kinda like the new one. A large reason for going with Sony for this is that the reader is metal, and feels good in the hand. Also having a place to attach a wrist-strap makes me feel much better about toting the thing everywhere.
I *LOVE* having collections on the card. All of my books are in collections now. They already made things easier with the alphabetical "jump to letter span" but with collections, I no longer have to scroll through 15+ pages to find what I want to read.
Other issue: you are much more likely to press the button keys by accident, but since this just brings up the "jump to page" dialog, it's not as bad (you can cancel it with the menu button).
Best part so far? Collections, collections, collections. Oh, and the screen. But collections!