I still have a broken in b17 in my closet that never got comfortable in any position of bar-saddle drop. It would have been terrible with a high handlebar position, like a-bars.

I got the b67 and never looked back....that is by far the best saddle I have ever used and the last I'll use . The b66 is the same but has the old-school 2 rail design that I didn't want to mess with, so I got the b67.