Stay away from P tires. C range tires really are the best on the Ranger I think. They are not too rough, but provide a much more stable tire.
I'm not a huge fan of the BFG A/T myself (or any A/T in general), but it is a pretty good tire. They look like they would hydroplane, but they really don't much at all. Several of my friends in Oregon ran them on the trucks and SUVs and loved them. They cake up in the mud, but that is it. There are a ton of people in the Pacific NW that buy them year after year. Look around for Discount Tire/ Americas Tire, they usually run good prices and they will price match. Costco carries BFGs as well, although I don't remember how their prices are.
2006 F150 FX4 Super Crew - Bilstien 5100s leveled 2", 35" KM2s, 4.56 gears, Detroit locker, Eaton E-Locker, Traction Bars, AEM intake, Xcal 2
2010 VW Golf TDI 6MT