Go to Best Buy, Circuit City or Al/Eds Autosound - any of them will have a selection. For higher quality items go to Good Guys. It depends on how much you are willing to spend - the Garmin Street Pilot 2620 is one of the best out there but it is pricey. If you can live with B & W - go with the regular StreetPilot - or the GPS V5 -
http://www.garmin.com/mobile/products.html#automotive
or just ask us Southern Californians for directions.