Probably a Firefly Ti or Stainless frame
Enve Fork
3T Cockpit
Dura Ace Di2 shifters, derailleurs, cassette
Lightest (and durable) crank I can find
Enve Seatpost
No idea what saddle, I'm fine with the Ritchey I have, but there's probably a few that are better.
I'm pretty happy with my November wheels but if money were no factor, I'd look at the new 3T, Enve, or Lightweight wheels.