HTC Sensation 4G (T-Mobile)

Pros: -built with quality materials.
-Dual-core 1.2Ghz proc.
-Phone calls sound land-line good when full signal.
-4G Hotspot is insanely fast and a nice/easy feature.
- HTC Sense (Easy, quick access to apps from lock screen). I quickly missed it.

Cons: - battery life not all that great when handset is frequently used.
- not quite the level of access to (all) the apps apple has.
- not as many consumer products are synced to android yet (car audio systems).

Summary: I would have kept this phone for a long time if I didn't have to switch carriers for better coverage where I work. It is an amazing phone. The iPhone 4 is so different its a shame to say this, but I would take a HTC Sensation over iPhone any day (and I have been an apple man for five years or so now).