First off the blackberry device is going to be completely diffrent than your treo. First its menu driven, no stylus. No point and click.
The good thing is the OS on blackberry is alot more stable than the palm OS.
So you wont have to hard reset it as much as the treo.
And really you more than likely wont ever have too.
The 7250 is going to be bigger than your treo. Its not going to be slim and pretty as a treo. Though typing on the qwery keypad will be easier as the keypad letters are not all close together.

__________________
WDTS PEON