I tried every kind of seat and settled on an off the shelf Sargent Low seat for my R1200GS. I put the front high and the back low and loved that seat. Good for 600+ mile days, and it was great for 40K miles for me, and nearly 120K for the friend I later gave it to.
Rick Mayer is as comfortable, but his customer service sucked for me and a few friends, and the leather wears fast.
Jim