Not sure which GPS unit is the most durable and reliable for your next off-road adventure? Compare our most popular off-road navigators: Garmin zumo 396 LMT-S vs. zumo XT vs. zumo XT2 vs. GPSMAP 276Cx vs. Overlander vs. Tread (XL) Overland Edition vs. Tread XL – Baja Series vs. Montana 700i