I need to have a Treo for business just because it is a much better phone for that (one hand operation in the car is a must)... but dang, this is a rough transition. Anything you ever wanted to do to the Touch Pro could be tweaked. The screen looked significantly better. It was just a better phone in general.
For the record, I tried the Treo Pro and it crashed and lagged so I had to get something different, hence the 800W.