The Chevrolet TrailBlazer and its many sibs are extinct. The Ford Explorer nameplate survives, but it’s now attached to a car-based crossover. Only one family of domestic midsize conventional SUVs remains—and, quite ironically, it’s based on a Mercedes platform. We’ve examined the five-seat Jeep Grand Cherokee before. For those more focused on people hauling than rock crawling Chrysler more recently introduced the seven-seat Dodge Durango. Is the all-new 2011 Durango only for people who need the dependable towing capacity of a conventional SUV? Or can it compete with the transverse-engined competition on their own terms?