Not had any of the other phones mentioned so can't comment on how they perform. After loads of problems with my Blackberry Storm (probably early model Nige mentions) I went for Iphone 3G , then 3Gs and now Iphone4.

Very good all round phone, ease of use and functions etc etc. OK, theres a few things that other phones do that the Iphone's have never done but even so, never been a problem.

I got the free bumper cover for mine, because it was free but even without it my phones not had the signal issue so many people complain about.

So my vote goes with Iphone