It's all perspective on what's the best hitch, but I drove 6,000 miles last summer with my ProPride hitch and never, and I mean never, swayed because of tractor trailer and we were on a 3 week trip, packed to the max.
I love the 5th wheelers because you gobble up some of the length over the bed. That's gotta be priceless when driving all day long in heavy traffic. Plus the interiors are usually higher quality components, albeit heavier.