I have been riding dual purpose bikes for 40 years. In the early 70's the stock seats were not too bad, but in the 80's the big four Japanese dual purpose bikes began to have off-road seats on them that were terrible for the highway for more than 30 minutes.
I have been ordering Corbin seats for dual purpose bikes for over 15 years and have never been disappointed. My latest bike, 2012 Suzuki DRZ-400 had a terrible seat that all the reviews commented on. The seat was so narrow and the bike so narrow, I did not see how Corbin could pull it off, but they did with a much wider seat that amazingly looks perfect on the bike and has the usual Corbin comfort I expect. I have had many comments, all positive on this seat and all the other Corbin seats I have had for all four Japanese dual purpose and even my Burgman 650 scooter/touring seat which was already comfortable, but I wanted the back support of the Corbin.
My KTM 650 Adventure bike also has a Corbin seat which is not only comfortable but eases the vibration as well. If you have a dual purpose or adventure bike, you will be so much more comfortable on the highway, you will be able to ride for much longer stretches without taking a break. You will also be able to sit down when you get home.
I know there are several options for big touring bikes and I don't know much about them since I have always had dual purpose or adventure bikes ranging from 250CC to BMW GS 1000 seats and they have all been excellent in comfort, quality and looks. Since the adventure/dual purpose bike is a fast growing market with generally poor seats, do yourself a favor and check out Corbin. They have the greatest selection by far for this market. Just call Corbin.