The 2500 runs out of payload WAY to quickly. My 2500 CCSB Denali had 2200-2300 lbs capacity.load 400# of people/dogs and your left with 1900#. Not much left for hitch and pin weight, firewood, etc. Airbags will cost more than any additional cost of the 1 ton. The 20" wheels and tires on the 2500 aren't available on the 3500 because they don't have the necessary weight capacity so now your double screwed so add the cost of upgrading wheels/tires to the cost of airbags. And the law will still look at it as a 2500 no matter what you do to it and in their eyes overloaded is overloaded. My 3500hd Denali CCLB doesn't ride any worse than the 2500 because it's not sitting on the overload springs when empty so no worries there. Save yourself some future grief and get the 3500 so that you have room for growth with any future RV's. I'm already wishing that I'd gone dually when I upgraded to my 3500HD. BTW, I LOVE my GMC!