The best reviews I have seen have been Maxxis M8008's, or Khumo Radial 857's. The Khumo's are load range D and on Tire Rack for $127/ea. You would have to check a local for Maxxis. I know Discount Tire sells them up here, but I don't remember what they ran.
I have seen mixed reviews for the Goodyear Marathons. Some love them, some hate them. I have also seen some good reviews for Towmax. The ones I specificaly will stay away from are Carlisle, Trail Express or other off brands. Almost always hear they are garbage.
Just my $.02
TV: '06 Ram 1500 SLT QCSB Hemi 4x4
TT: '12 Grey Wolf 27BHKS
Tow Acc: Tekonsha P3 BC, Curt round bar WDH w/sway control, CIPA custom fit tow mirrors