I understand exactly where you are coming from Dabluz. My rear end endurance was born from very long deer seasons here in Alabama. Bow season starts around the 15th of October, feeds right into gun season on the Saturday before Thanksgiving, and is non-stop until the 10th of Feb. I spend the majority of my time in the woods in those months, several hours a day. I sit on just about anything out there, rock, tree stump, hard metal chairs, sometimes even the ground itself. Point being, that during hunting I don't even dare to shift my butt much. So just being able to do that helps on a motorcycle. I also used to have a 650 custom that I spent a lot of time on. Worst seat Yamaha makes in my opinion, and that is the one I rode 650 miles in one day on. Since that custom, I have found just about every other MC seat very comfortable.
I don't have to have fast, I just have to have fun!