Two unique features make the Onix the year's best GPS for the backcountry. The first is a layering function that lets you view different kinds of informationcompass, waypoints, and map, for exampleon the display together, eliminating the need to continually scroll between screens. The secondand even coolerfeature is the Onix's ability to let you reference satellite or aerial images on the fly. Before you head out, download an image from bushnellgps.com (you can store up to 15) and the Onix automatically syncs it with its navigational and mapping data. 4 oz; bushnellgps.comBonus: A battery-saving "sleep mode" turns off the display but maintains satellite connections for up to 26 hours, warning you audibly if you stray off course.Bummer: The black-and-white screen we tested is lackluster, but just before press time Bushnell announced a color version ($300).