Chris King: Gripnut or 2nut?

fc9k
On the CK website it says the 2nut has a stack height of 37.4 and the gripnut is 33-38mm. Which would be best? And am I going to end up having to saw 1.1mm off the end of my fork steerer to get it fitting nicely?

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I don't know much about CK headsets, but if it was me I'd get the gripnut for flexibility in the future on different frames. If you get the 2nut then (depending on the Chorus stack height) you might need to cut down your steerer or use a spacer. However, it depends how close the current top nut is to the top of the steerer. If there's already a couple of mm of space then you'd be ok without either. Personally I'd use a spacer because it gives more flexibility in the future with other headsets.

Colourwise - silver is the way to go on a classic old frame like that. Out of interest, why are you replacing the headset? I'd leave it Italian and old school on such a nice frame.