My new truck is a 4x4 F250 6.2l CCSB, I went this route because many times I was over my payload by a good margin with everything I had in the truck. the Tundra handled it, but not as comfortably as I would like. had I been only a few hundred pounds over weight I would have kept her. However, I was routinely 1000 pounds over my payload when fully loaded and it still handled it pretty well.
I opted to upgrade to the 3/4 ton truck purely for safety because, my wife, kids, kids friends and dog are counting on me not to take chances with their safety. Now, the ride when empty is very stiff compared to the Tundra, but that's the compromise I had to make for my situation.
You just made the case for the Ram.