After running both the Goodyear MT/R's and BFG A/T's we are going with the A/Ts from now on. The Goodyears were excellent, lasted a long time and only recently did we have problems with them going out of balance....got over 30k out of them. They performed well in almost everything, but we were not impressed with their performance in the mud or the increased road noise of mudders.
The BFG A/T's have so many miles on them I lost count, and one is running with a plug. They have performed just as well as the MT/R's, with better balancing and less road noise. Since the trucks are also driven as dd's this is important to us.
Our conclusion? Unless you are doing a lot of hardcore rockcrawling, have a dedicated trail rig that doesn't leave your driveway for anything other than adventure, or live somewhere with a ton of mud, there is not much reason to have the MT's on other than cool factor. When the time comes to replace the Goodyears we will be putting BFG A/T's on.