Do you really need 37s? I mean do you actually use the truck to go wheeling, more than a dirt road? In my youth I did a lot of exploring in a toyota on 35s that I set up for crawling, and realistically could have done all the exploring with the stock tire size of 27s.
I feel most on here want to spend money on big tires they'll never use.
Kevin
Looking cool is enough reason for me. Same reason you choose a color when you buy a truck.