Wouldn't touch a Sony ..... software is just too crap. (Although better than it was)
You looked at the iAudio D2? Bigger/better screen than the Sony. Battery life almost as good. More features. 4gb flash expandable with SD cards (costs buttons, up to 8gb - 12gb total .... nice!). Touch screen. Excellent manufacturer support (firmware updates etc). No drivers, software etc required (as long as your PC isn't prehistoric!) .... true UMS device so drag and drop whatever you want from any computer ..... truly portable (as these things should be IMO).
If I didn't already have it's big brother, I'd be thinking about getting one .....
(although, to be fair, they are still getting a few bugs ironed out of the current firmware .... still looks like a damn fine player tho!)