I have had 5 sets of Bridgestone Dueler A/T's (the old tread pattern) on my other 2 trucks, a 97 EC Z71, and 03 1500HD. I had no problems with them and got 45-50k out of all of them. This truck still has the stock BS Duravis' on it. I have a friend that can get me some Hankook RF10's at his...
I like it pretty good. It was easy to install and it looks good. I can hear the turbo better also. I don't know about performance. The guy from S&B on the duramaxforum backs all of their claims about them and a couple of the guys have been to their facility and say it's top notch.