My 04 2500 4x4 QC had 2000 lb pallet of landscape rock in the bed and my front tires were just about off the ground. I was shocked, none the less, I was afraid to drive over 25 mph on the 4 mile drive home. 2 months later I bought my 04. 5 3500 4x4 QC. . I never got the chance to haul anything other than my camper shell in that truck. I know it would have done much better as it had the extra springs in the rear.
Its a shame that Dodge says not to haul an overhead camper in the trucks. I have owned 3 11'3'' Lance campers and never had any issue with a 3/4 Chevy 4x4 or my Ford F350. I put the same Lance on my 98 Dodge 2500 4x4 QC and scared the heck out of me. When I got home, I pulled it off and sold the camper. Ive had a motor home and a travel trailer since.
My next truck will most lilkely be a 07 Dodge, but not sure if I want to bother with the Mega cab unless they improve the looks. For now, Im driving a Chevy Blazer and waiting to see what the Dodge boys do next year.

I may even buy a gasser if Diesel dosn't come back to earth. It is still $2. 65 here while unleaded is @ $2. 07 :-{} . .