If you live in Colorado go with the S6F. The extras that come or can be added to the S6X are too soft to handle the abuse caused in our rivers. The other main difference in the hull of the boats is the decreased rocker in the S6F. This new shape adds considable speed for wave and river running performance. The S6F is truely the best of both worlds. It has the bottom of the S6 and the top of the S6X.
I love to dance, but who needs the music- It throws me off.