Garmin C550 - or you recommendatin for a portable navigation
The nav part of it is spot on, and everything is clear and easy to use. Also, the traffic system works amazing as well.
The only drawback I notice is the battery life is pretty crappy. I have it hard wired with the cord into the Infinit, so when I use it in the Audi I just run on battery. Also, the cord has the antenna for the traffic system so if you go commando it is without the traffic.
Just be sure to get one with "Text-to-speech" capability, so that the unit tells you the street name instead of just telling you to turn in 500 feet or whatever.



