How about a P255/75R17 in either a Goodyear SilentArmor or a Firestone Destination AT?
http://www.tirerack.com/tires/TireS...omSizeSearch=&width=255/&ratio=75&diameter=17
32.1" Tire, no lift required.
I used to take my F150 on all kinds of back roads with 31" SilentArmors and I never needed anything more.
Jason
My Duratracs do everything better than my Silentarmors did. If you like the SA's, you'll love the DT's. But they obviously may not last as long. Got 55,000 out of my SA's.