Seats are very subjective. I bought a custom-built seat from Renazco for my F800GS. When it arrived, I used it while riding a half-day in the Micheux State Forest and on paved roads. I listed it for sale on the ADVRider flea market within 24 hours. It was no more comfortable than the BMW standard seat. I submit the expensive Renazco is best suited for the riding and bikes on which Renazco built their reputation, rather than heavy dual-sports.
But then, after all, seats are very subjective!