I would almost go with the BFGs again, not sure why they are bald, unless someone put that set on the trade it in.
Other options may be the Nitto Trails, Toyo Open Country MT if you want something aggressive. If not, the BFGs you get outside the factory will go 50k and ride very well.
2012 F250 6.7 Lariat Ultimate CCSB FX4
2012 F150 Ecoboost FX4 CCSB FX4
2011 F250 6.7 Lariat Ult CCSB FX4 (sold)
2009 F250 6.4 KR CCSB 4x4 FX4 (sold)
2011 Raptor 6.2 Crew SVT (sold at 9,000)