Agree with Mike. The flat top on the B68 is very comfortable for me. I have one on my drop bar touring bike and love it. My favorite Brooks by far.

I also gave the B17 a good try but never did like it. I don't know if it is the too soft leather or the goofy little seam between the top and sides. That seam didn't like me. My wife doesn't find the B17 uncomfortable but prefers the Champion Flyer S (sprung) or the Professional S (unsprung) which are identical other than the springs.