Article: The road worrier: the latest in GPS navigation.(THE GUIDE: THE DIGITAL MAN)

IN ORDER TO TEST the strength of our 17 years of blissful marriage, Sweetie and I recently made the six-hour drive from our house in Telluride, Colorado, to Santa Fe to visit the Coen brothers on the set of their new movie. Our big point of contention was the three GPS navigation units I brought along. Sweetie hates them; perhaps she's jealous of a female voice other than hers telling me what to do.

I brought the new Magellan RoadMate 3000T, Garmin StreetPilot c550, and Pioneer AVIC-S1, each suction-cupped to the windshield, telling me how to get to my destination. (Sweetie, meanwhile, was armed with a paper map.) All of these new navigation devices share the ability to be ...

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