Garmin zumo 550 GPS Receiver

I have been using this unit for several months on my motorcycle.

This unit is great for a motorcycle if you want MP3 player, XM Radio, and/or Bluetooth integration with your phone. It is water resistant, vibration/shock resistant, dust resistant, you can use it fairly well with gloves on, and the motorcycle mount kit is excellent.

If you were thinking of getting this for a car, I would think that it would be an expensive choice if you didn't need those environmental features.