OP - before this thread descends into more pointless bickering, i'm bowing out. My very strong recommendation to you is to stick with C-range tires. If you feel that beefier tires will give you increased piece of mind, then by all means go with D. But there's no reason to go to E-range. Regardless of the pressure required, they are unnecessarily heavy which adversely affects fuel mileage, power, and handling...it puts more stress on your suspension, CVs, and hubs, and E's will be louder and harsher-riding than C's at any pressure...even if just by a little. For all those compromises, you don't really gain anything on a 1/2-ton truck - D's are more than enough for towing even if you are at the extreme limit, and sidewall toughness does not increase linearly (or in some cases, at all) with load rating (search the Jeep forums if you want proof of that).