Kenwood Excelon KDC-x696
This single-DIN stereo is one of the highest-rated units available. This unit builds on Kenwood's reputation for great sound quality and adds great features such as Bluetooth and USB. The unit allows you to connect via Bluetooth to make and receive hands-free phone calls with an included microphone and dedicated "phone" button.
The stereo also features the ability to link up with Pandora Internet Radio. When connected to your phone's internet connection, the unit allows you to scroll through your favorite stations and select what you are in the mood for. You can also thumbs-up or thumbs-down a song right from the front of the unit.
This unit also has a detachable face and, with the right adapter, will allow to you retain use of your vehicle's steering wheel audio controls. It comes with a remote control and a two-year warranty. (http://www.kenwoodusa.com/)