I used to have 31's BFG AT. They were fine on road but again depending on what you will do. I went from the BFG AT 31's to Maxxis Bigihorns 32's and know I run 33's TrXus radial MT and I think I will never look back. First of all, IMHO I think its a cool looking tire that is quiet on and off road.
What size you looking to get?