I know the thread is a little old, but I just wanted to chime in. I have the Cooper STT on my jeep. They currently have 46k on them and there is still 6-7/32" tread left on them. These tires have been great in every situation, rain,snow and mud. I highly recommend them.
As for the duratracs i dont have first hand experience with them, but my brother does. He had 315/75/16 duras on the jk and they were beat after 26k of hwy driving. He now has STT's and loves them.
2000 TJ 5.5 Long arm, lots of extras. R.I.P.
2005 LJ rubi 35's Clayton, lots of extras