2006 VW TDI. 35 MPG average for me. Reliable, clean.
Aftermarket 7" Kenwood DNX7180 in-dash Garmin Navigation with support for stereo bluetooth, calling and an iPod cable can be found in the glove box. The system is easy to use and fairly intuitive. Premium sound system also installed with additional sound deadening for a quiet ride.
Trunk space is slightly limited by stereo system. Can still fit a medium sized luggage, large duffle or a set of golf clubs, plus a backpack and some personal items. If your traveling alone or just with someone else, there is always the back seat.