Lots of good choice for shocks if needed. I have never heard anyone on this forum suggest Monroe RV shocks. My motorhome mechanic suggested them versus the others and said he would provide lifetime warranty on parts AND labor. 10,000 miles on them with good results. I also have done all the other suspension upgrades on my 2007 2100. Heavy duty anti-sway bars, front steering stabilizer, air bags and the shocks. All worthwhile, but a truck is a truck when it comes to bumps on the road.
Others on this forum have suggested different springs, front and/or rear. I'll skip this.