Personally had great luck with the COOPER SST's, however, only a 'D' rated tire. Upgraded my rims to 18" XD Diesels, and a set of Interco TrXus M/T's in 33/12/5/18. FANTASTIC! Have about 10K on them and just now seeing signs of wearing. Excellent mud and snow reliability, believe me, have tested them more'n once! Kinda pricey though, around 300/tire. My 2 cents.