Scared of getting lost? Don't worry; a GPS unit can keep you on-course and away from dead ends. The Garmin Nüvi 350 combines a personal travel assistant (like having a tour guide with you) and entertainment (an MP3 player) with top-notch navigation. The Magellan RoadMate is familiar to anyone who’s driven a Hearst NeverLost, and its turn-by-turn voice system is pleasant to use. The TomTom Go uses Bluetooth to talk to your cell phone. You can make in-car calls with your GPS without ever touching your phone. I rounded up these three amigos for you to compare, side-by-side—just scroll down the page.