I am an Android user who came from an iPhone 3G. I was upset that I didn't get iOS 4 updates as promised so I bought the 'then' most powerful smartphone, the Atrix 4G. It is powerful with the aid of Launcher Pro+ and superuser privileges. It is running 2.3.4.
I came from Go Phone -> Motorola RAZR -> Palm Treo 700WX -> iPhone 3G -> Motorola Atrix 4G
I came from Go Phone -> Motorola RAZR -> Palm Treo 700WX -> iPhone 3G -> Motorola Atrix 4G