Between reading the "weight police" postings and weighing my
Tundra, i decided to trade to a 250/350 and wound up with Ford deisel.
Towed the trailer 400 miles this last week and am now a believer.
The truck smoothed out the road and all but eliminated any chucking.
I don't know if it was the weight, the suspension or the wheel base, (it's a long bed), probably all three, but it was a better towing experience.
It also flattened the road, making the hills much easier to climb.
All in all, I just felt i was in a lot better control.