We've had zero issues at work with our two godzilla motors. They get idled, ran hard and put away wet regularly by the journeyman and apprentices. I think you made a great choice Greg. I was actually talking to a buddy about getting the same setup for his family (toyota guy). He doesn't pull often enough or heavy enough to really need a diesel, but wants a bigger truck to fit the whole family and pull the occasional skidsteer/tractor/dump trailer with plans to upgrade to a 5th wheel toy hauler/camper in the near future.
I love diesels, and I'm a Chevy guy, but from what I've seen these trucks go thru at work I wouldn't hesitate to buy the Ford 6.7 or the 7.3.