Ive had them all mate and i always seem to go back to the iphone, i got the samsung galaxy when it first came out and the 3g iphone i had at the time put it to shame in terms of ease of use and speed.

Im glad ive stuck to the 4, nothing else touches it imo, and i never wanted to go apple for a long time.

Also i use a lot of hire cars at work and 9 times out of 10 the bluetooth connects to the car and i can play my music or have calls over the bluetooth.