On current truck have run the Nitto Mud Grapplers, the Cooper STT Pro's and now the Toyo Open Country RT (all in 35ish) and they have all performed well off road, Nitto only got 17K miles, Coopers got I think 22K, Toyos will probably run longest but still not hit wear guarantee.  Overall I liked the Coopers the best on this truck (RAM 3500 Crew) and the Duratracs on previous Dmax were great but I like sticking with factory wheels....
Bottom line is the Coopers seem to get great reviews on half tons and smaller but when you get into the 2500/3500 they eat all of them alive in short time.