I went from mostly stock to adding the lift, sliders, front TJM bumper and winch all at once installed by Slee, and I barely noticed a difference in ride quality. Maybe a little less divey on the front end when hard on the brakes and a little more planted around corners, but generally speaking the ride did not degrade or change much from stock at all. I would think that means even the medium is suited to adding a bit more weight, as I obviously added a couple hundred pounds of weight to the truck at the same time as the lift. The clear choice is call Christo back and order a bumper or two and some sliders, and your truck will ride great! 
