You are all entitled to your own openion, so its just a matter of preferance.
I have personally gone more places with a 31x10.5x15 tire than my 30's could. They look better and fit the wheel well better.
If its only an extra inch or two, then the difference in mpg and power wont be enough to turn you away either.
In regards to that, it depends on the weight of the rim, and the width of the tire.
I havent been able to find any 33x10.5 or smaller width tire, so I just might go with 32's? (any input here guys)
Also, which is better, the 3spd audo or 4spd auto?
Sorry for slightly jacing your thread, but its good questions too.
If you get the 31's and it bothers you THAT MUCH then just throw on an intake/exhaust/cam/header or shed a few pounds.
All depends on what you want to use it for.
I can promise you that if you have your t-case in 4LO, you truck would turn over even 35's no matter the gearing. Its more a question of on road performance that matters...
Bryce