I have a Treo600 and love it. I wish I had a 650 because the bluetooh is great for a headset.

I've used a Palm for about 7 years and am a heavy outlook user. Perfect combination for me. Email, web, SMS, etc. I compress DVDs on it and have Incredibles, Monsters Inc, and Nemo on a 256MB card. (I use pqdvd.)

Highly recommend the Treo. Yes, it's a little big, but you get used to it. I use egrips and makes it less likely to drop.