The one thing though, whether it is a Ford or a GM, the crew cab diesel dually 4x4 is essentially a commercial vehicle. Or military. Waaaayyy beyond regular consumer standards. The hauling and tow capacities are unreal. They are enormous and super comfortable. I love my truck.
But I'll bet you could find a lightly used one for around 45k and it would stay worth 45k for 5 years.