On the F-53 chassis, I couldn't find any information that convinced me to replace our shocks with Koni shocks. On diesel rigs, there seems to be some good reasons for using Koni shocks. So, I went with Bilstein shocks because they were less costly. You could consider putting Koni shocks on the front and Bilstein shocks on the rear if you think the Koni shocks could be a little better for the front.
I added the Roadmaster return center steering stabilizer to our rig and it was well worth it.
But tire pressure can be the bigger influence on ride quality and steering control. Using axle weights (can't find a place for 4 corner weight measurement) and the Toyo tire inflation chart for my tires improved the ride and stability of our rig.
Retired but busier than ever!
2012 Newmar Bay Star 3302
5 Star Tune, SumoSprings, Roadmaster Steering Stabilizer, Blue Ox Avail
Brake Buddy, 2015 Chevy Malibu