I've been using a B17 normal width with a drop from saddle top to top of bars of 4.5" I was fine with it although I always wished it set back a bit more and it was firmer. My sitbones rested on the curved metal bar in back mostly. The sitbone indents which took over 6000mi to develop are right over that metal bar, almost looks like the metal is bent a bit now at the sitbone contacts.
I am trying a Team Pro which should arrive Oct-11.
I haven't measured my sitbones.
Al