I just had my Becker head unit replaced with a Kenwood DAB BT one instead which has Parrot BT in it. That way I can have DAB radio, BT streaming, iPod & aux as well as CD along with hands free phone. And it charges my iPhone.
I've used parrot devices in other cars. They are very good, but I didn't want another device in the cockpit.
The 6" sat nav and the Scangauge 2 is enough!