Um...

... see my profile?
I started out with a PDA (Toshiba 330), upgraded to a better PDA (Dell Axim 5v). Then bought an eBookwise. Then - when Sony offered the 500 for $50 with a credit card - bought a Sony 500. Tried a Cybook, didn't like it. So - finally - bought a Sony 505.
Phwew!
So these days, I mostly read on the 505. I gave the 500 to a friend. My co-worker is borrowing the eBookwise most days. Gave the old Toshiba PDA to a different work friend. I'll read on the PDA if I want to read a book NOW and don't feel like converting it from eReader format to LRF. And I keep moving the Cybook around the living room - not quite ready to give up on it, but just not using it.
I was so glad the Sony 700 was a step back in clarity so I wasn't tempted to buy one!
The one I'm watching now is Astak's line. They keep hinting at eReader format on eInk...I just might have to buy one of those, too, if they ever surface (and aren't too pricy). Probably would guarantee the release of the Cybook, too.