SARGENT WORLD PERFORMANCE SEAT!!
I've had Corbin, Russell, Sargent, Airhawk, Etc and can verify (at least based upon MY humble opinion) that the Sargent seats are THE most comfortable seats. I'm often called "Princess and the Pea" by my buddies because I'm so selective. That should say something

After 6+ hours, every seat on earth will cause your butt muscles to start aching a little and cause you to want to shift around. However, the Sargent has the best shape and firmness to let you ride and ride.
**Sidenote: When I got my first Sargent seat on my K1600GT a few years ago, I bickered and bitched after riding for 10 minutes that they had duped me into purchasing a hard seat and there was no way I would like it over the stock seat. But, after riding for an hour... and then 4 hours... and then 10+ hour trips, I was pleasantly surprised (to say the least). I've since purchased (3) others for my other bikes. The Sargent I had on my R1200GSA has been migrated to my new R1250GSA and is - without question - the best mod I put on my bikes.
It IS important to note that everyone's backside is different. I am 6'6" and 220lbs so I have a fairly slender, bone-y backside. Someone with more meat on their bones may like a spongier / mushier seat but ---the overall consensus among the guys I've biked with over the years is that seats generally need to be "firm" to be comfortable for long hauls. The softer seats are what cause the meat on your backside to fatigue easier.
I don't think you'll go wrong with the Sargent World Performance Seat-- but be sure to give it some miles before formulating your opinion. **I always keep a deflated Airhawk portable cushion in my saddlebag on ALL my bikes in case i ever do a days-long ride and want a different pad to break up the muscles but the Sargent does the best job any long-journey of ANY long-haul seat. They also look good which is a bonus