I actually went and talked to my lbs, and they said that the integrated headset units from Cannondale on the CAAD9s are sort of, but not really proprietary. He recommended I not buy any of the above, but use the one with the fork I have, and if the bearings or anything in it needs work, they can do that.

So that's my resolution. I'll take them the fork and let them do the install with what I have if it will work. That will also safe some $$ too.