Had the original BF's, only got 30K out of them, put on a set of Bridgestone Dueler H/L's, crap tire like the BF's, only got 30K out of them, pro-rated tire, so applied 1/2 the cost to a set of Bridgestone Alenza's. The Alenza's are not a bad tire for the money, got 50K out of them, proving there wasn't something wrong with my truck as I was beginning to wonder why I was chewing through tires.
Just put a set of Michelin LTX M/S's on mine this weekend. Had them on previous Explorers and got over 80K on all 3 sets on different vehicles. Best tire for the money. You will pay more up front, but cost less over the life of the tire. Michelin is running a rebate($70 on a set of 4) on them now through Discount Tire.