Challenger 1, I know you've towed a lot, and appreciate your opinion. I just towed 600 miles with the bars on, and the ride is a little better with the bigger truck, but not a lot. Was hoping for a Cadillac ride ha ha. Bars it is for me.
The major benefit that I did not mention and the main purpose of them is to give you better control and braking.
Play with your tire pressures to get a softer ride and watch your tire temps with a IR gun as soon as you roll into a rest area. Can check your wheel bearings too that way.