My son has a half-ton rated Tundra with a Hawk, no sway plenty of power.
Regarding diesel, been there done that. Loved the turbo diesel with a large Hallmark with bathroom etc, going up the Colorado passes.
Problem: wife hated the noise and smell; cold weather starting; oil changes are expensive with that large oil reservoir and need to be changed more frequently that gaser; in Colorado diesels have to have emissions tests every year. Altogether I found diesel far more expensive to operate per mile that gaser.