Animal, I rode sporty's in the 70's I know the ruff ride you are talking about, then I got a 1979 Shovel FLH with the po-go seat, It was better, now I have a 06 heritage , wow what a difference, I also had a 08 road king ,but did not like how high it was compared to the heritage, 3" higher. So I sold the king. It would cost more than 5 grand to upgrade the stock king to how I have the heritage set up. I just returned last month from a 3097 mile road trip,and the heritage rode smooth as silk, even at 75-85 MPH with a 5 speed. 160 miles to 180 miles for gas, with no need to give my rear a break.