I have found in my studies that the difference between a 3/4 ton and 1 ton in single wheel configuration is minimal. In my particular year, 2002 Chev. HD, the only difference is an overload spring on the 1 ton. I just went up in trailer size to a Nitro XLR 321 toy hauler (12,300 empty) and stayed with the 2500 HD Duramax. Here are my impressions after a first tow of about 1,000 miles: Truck: 2002 Chev. 2500 HD Duramax with 115,000 miles. Has a Bullydog chip set on tow/haul. Oversized transmission pan. 7,500 # Air Lift bags at 60# of air. Upgraded tires from 3,000 each to 3,400 each. The weight of my truck is 7,300 with hitch, me and the stuff in the back. The rear wheels are 3,100# and rated for 6084 with stock tires. My tires upgrade this to 6,800#. This allows for a pin weight of around 3,000 if I am figuring correctly. Pin weight on the trailer is about 2,500. My route ranged from 3,500 ft. elevation to 7,800 ft. with temperatures from 39 degrees to 75 degrees. Speeds were 60 to 70 MPH with a combination of interstate and regular highway. Trans temp was never above 210 degrees, engine temp was never above 210 degrees. EGT was never above 1,200 degrees except for a few short durations when they hit 1,300 on a hard pull. The trip included some periods of crosswinds that were noticeable but not scary. All this being said, if I was going to be doing a lot of long trips, or pulling a lot, I would try to fit a 3500 SRW into the budget. If I planned to go full time it would have to be with a dually, but for now I plan to get by with what I have.