Garmin GPS Map 60Cs
Garmin 60CS is what I use in my car, my bicycle and when hiking. Its an awesome hand held gps mapping unit. I used a Garmin Vista before that but the battery life was terrible, the screen difficult to read in bright light, and it often lost satellite reception in heavy tree cover, or around cliffs. That said I just bought an edge 305, and love it for what it is, a training device and bike computer that uses GPS technology for speed and course calculations. But if you want a GPS for mapping and routing I love my GPS 60Cs.