Someone recommend some good headsets! I have heard of chris king but get quite lost in what I am looking for. I am riding a standard aluminum cannondale synapse. I was professionally fit and just talked to the fitter again today and was encouraged to slam the stem as I am flexible.

FORK
SYNAPSE SAVE, CARBON BLADES, 1-1/8"
HEADSET
SYNAPSE SI, 25MM TOP CAP