I went thru 150/1500 pickups and 3 5vr's. Then when I was two yrs, thought it would be one yr from retirement we researched for a yrs which 5'vr we wanted.
After settling on our primary trailer, checked all the specs then spec'd the truck to tow it.
We then ordered the truck properly equipped with options we desired. I did have to "settle" for a 8.1 gas (in lieu of the Duramax desiel).
Ordered the 2500HD, with tow pkg and 4.l0 rear axle, towing capacity 12000 lbs.
Our 5'v, dry weight 7300, camping weight 9200-9300 lbs. Pin weight 1500 lbs. it was a perfect match. Even going up 6% grade, I could accelerate up to speed limit and beyond. Made towing a pleasure. No more of the "I think I can, I think I can". Best part, DW became much less stressed also. Win-Win-Win. When merging onto highway, I can easily get up to 65 mph. The 1500's, no way, and both had 3.73 rear end and 5.7/5.3 engines.
Yes, MPG was terrible in town, but that what the Toyota was for. Towing mileage avg was 9.3, if I drove nice, and I became a nice driver. No more 80-mph runs, although I could until china-bombs would blow.
If you want a truck to tow, get a TRUCK.