 The 6.0 Powerstroke tows heavy equipment like it is empty. The torque is exceptional and the automatic transmission is geared perfectly whether loaded or empty. The brakes are very responsive unlike the spongecake type of the Chevy I replaced. My vote would be Cummins (Dodge) first, Ford second and the Duramax should actually be used for boat anchors. I went Ford because the Dodge people can't build a chassis dependable to go with their engine.