I've had this phone now for 2 weeks and it has met all of my expectations and exceeded them even. I upgraded from the 8125 and just about everything is a huge improvement!
The 3G(UMTS) is very impressive with it's speed. I even use this phone as a modem on my home pc and it's nearly identical in speed as DSL when surfing the net or downloading file/music etc.
Camera is very impressive with clear resolutions for a camera phone with the 2MP.
I also use a bluetooth headset 2.0 with this and mine works wonderfully with sony erriccson; it's quite intuitive and picks up the signal instantly. The 'blackberry' scroll wheel is a huge plus on this phone and I find myself using this feature more than any other buttons. 