Kontour seat: Gas tank and bladder become limiting factor, not the butt. Cool in the heat (airflow !!!) dry in the rain, and a pleasure to ride on all day, any day.
I ordered my Kontour shortly after buying the RT. Some used bikes can be purchased with aftermarket seats. My R1200R was traded with a Rick Mayer seat so somebody was spared the horror of the stock seat.
I tried an Alaska Leather sheepskin. It made the stock R1200R seat go from a 1-hour max ride to about a 3-hour ride. After the Sheepskin experiment, the Rick Mayer seat made for a comfortable seat on the RR. The problem with leather seats is that you absolutely have to have a rain cover for them too. Plus you have to maintain them with leather treatment or they will quickly dry out and look bad.
If you get rain with a sheepskin, it is going to get squishy wet, no way around that problem unless you wrap it in some kind of rain cover.
Don't you find the Kontour seat covering very slippery? I love the comfort of the foam but the material is so slippery I find my jewels rammed against the tank at each stop. Comment?