I got over 60,000 miles on my first set of BFG KOs. I'm now running KO2s.
Is that with a camper, or an empty truck?
By the way, the 46psi for E rated tires corresponds well with the 30 psi for P rated tires, using the method in the Toyo link above. Since we tend to overload the rear, more pressure for the rear tires seems like the right plan.