My 2012 F53 has almost every suspension add on made, with the exception of a rear trac bar. The previous owner did all the work, Sumo springs front and rear, Hellwig sway bars front and rear, Koni schools front and rear and a Blue OX true center steering stabilizer! All this was for nothing as the coach was all over the road! And why I believe he traded it in on a DP! What I found was the tire pressures were too high and the front toe was toed out By 5/8”z I set the tire pressures to 86 psi and set the toe by taper measure to 3/16 toe in. Night and day difference!
For handling, the CHF can’t be beat. And they all should have some type of stabilizer put on.
As for ride, Sunos and Konis will make it ride like a DO with air suspension (or close to it).