I agree with what everyone else said. You even said it yourself; everytime you leave BB for another device, you come back.

I had a 750 too and went to the 8700 and now on the 8800. The Treo is nice but you'll find it bulky and heavy compared to the 8700. Also, there are OS issues and you have to be careful with all those third party apps cause some of them tend to make the OS unstable. But there are some good apps out there.

The main thing you said though was email and the Microsoft OS doesn't have anything on BB email. Not even close. Unless you went to something like Good on the Treo.