I have ran several sets of Transforce with good results, and I drive a fair amount of gravel. But, last set on my 3500 dually I switched to Goodyear G947 RSS because the tire shop gave me a great deal on them. We'll see, but they seem to be working out just as good. We also run Transforce on our ambulance at the fire dept. and they do good in that application as well.
I used to be pretty set on tire choices by performance but at these prices you have to shop around a little. I like to buy from a shop that will actually fix a tire instead of hiding behind the liability excuse.