Pharos EZ Road
The least expensive of this group is much like a multifunction Palm Pilot. But it's hard to download maps, and, unlike most, it has no base maps at all. Tiny touch-screen "buttons" inhibit on-the-go inputs. It has an attractive look, but it won't match many modern interiors. ($550)
Garmin Streetpilot C320
The clear graphics have soft, pleasant colors. A rotary volume knob is handy. The points-of-interest database is slightly outdated, but the C320 is still a solid option. ($750)
Pioneer AVIC-N2
The useful XM-based traffic- and construction-monitoring system and vehicle-dynamics monitor make this more than your typical nav system with audio and DVD capabilities. The unit, with its large flip-up touch screen, is expensive, even before installation, but very cool. ($2550, including XM data and audio receiver)
Tomtom Go
The map downloads are easier than most others here, but, as with any of these, we'd recommend pricier models preloaded with your entire continent. The graphics are clear, but it's annoyingly hard to hold the view zoomed in or out-the screen defaults to an awkward in-between view. ($800)
Magellan Roadmate 300
The combination of touch screen and buttons is exceptionally easy to use. (We did snap off a piece of the mounting bracket trying to adjust the stiff arm while driving.) It's weak in big cities, and the screen is on the small side, but this is still our budget-friendly favorite. ($630)
www.pharosgps.com
www.garmin.com
www.pioneerelectronics.com
www.tomtom.com
www.magellangps.com