Time to select NEW tires

Happy Memorial Day to you all, I need to get some recommendations for selecting my next set of tires for my Tow vehicle. The Vehicle is my trusty 2001 F350 Crew Cab Dually (with Air Bags) powered by an International 7.3 with 150,000 well maintained miles (It is used almost exclusively to pull our trailer/vacation). Starting in 2010 I have had three sets of Firestone Transforce LT235/85R16E's M&S (which have performed FLAWLESSLY) first carrying a 5000 LB Artic Fox Slide-In, then in 2016 we switched to a 27 FT NUWA Fifth Wheel (Approx 11,000), we now have downsized to a 22Ft Nash Travel Trailer (Max Weight 7,400 LB's). I think a new set of the same Firestones would be "overkill" and another option might be a softer, quieter ride. A friend suggested trying Falcon's either Rubitrek A/T or WildPeak H/To2, LT's. Do I need to stay with Series E tires? I welcome input on these or other options from you all. Thank You in advance - travel SAFE - Wallace B