Sony MEX BT-2600
Microphone is pretty bad but apart from that it's a good HU. Love bluetooth audio streaming. Press play while walking up to car, get in, start engine, music playing on stereo. Winning.
Even if I don't have my phone, I just play music straight off the USB, the tiny stick in the above picture is fricking awesome, 16GB on that.
Also has a full set of RCA outputs, which I'll never use.