When you're cruising at 75 mph,,,,passing everyone,,, uphill,,, with camper in tow,,,, and you look down and notice the rpm's are at 1800,,,, you say to yourself "Self, buying a Duramax dually was a ...
I feel the same way about my new truck. It was a good decision. As for you guys jumping on the OP about his speed well just stay in the right lane and you will be ok.