Lincoln was among the first to field a luxury SUV a decade ago, and today the class is littered with compelling choices. Given its truck-based foundation and seven-passenger seating capacity, we'll limit our competitor list to similar vehicles. Primary competition includes the Cadillac Escalade, Chrysler Aspen, GMC Yukon Denali, Hummer H2, Infiniti QX56, Lexus LX 470, and Toyota Land Cruiser. Other models that Navigator intenders might consider include the Land Rover LR3, Lexus GX 470, and the Mercedes-Benz GL 450.