I tow a 34 ft 5th wheel at 18.5k lbs. I had a Trailer Saver TS3 hitch in our F450 for the first 10 years & it worked great, but it's very heavy, 270 lbs. I then switched to a Trail Air pin box with a standard light weight hitch, in an F350 dually diesel, that I could more easily remove, to slide my new truck camper into the truck for part of the year. The Trailer Saver was better overall, but there was still some "chucking', horizontal jerking. The Trail Air is better at controlling the 'chucking", but not as good at controlling the porpoising , vertical bouncing. If I was going to put a hitch in & leave it, I would get the Trailer Saver. If you want to remove the hitch sometimes, get the Trail Air, with a light weight hitch. Of course, price is a factor too. The Trailer Saver costs more than a Trail Air/standard hitch combo.
Freestyle_Freddy - fulltime since 2010 - "Chasin' Our Dream Fulltime"
2008 New Horizons 34' fifth wheel w/ 700 watt solar system
2017 Ford F350 Platinum diesel dually w/ air ride hitch