I just bought 6 Firestone Transforce AT's.
I have a 1 ton dually and they look like their going to do the job. Probably was the cheapest I could get for my tire size and still have an aggressive tread. Down side is I think my highway mileage is suffering a bit.
Firestone winterforce's are all I have run for several yrs on my cars. I currently run hankook winterpike rw 11's on my wife's jeep and have never had a problem getting anywhere. I personally would recommend either.