After getting frustrated with rapid wearing HG73 chains, I decided to snag a couple of the Ribble Campy 9 chains. I've got one in use now. So far it seems to be working well. I suppose I should measure it soon.

I'll look at those headsets. My latest build used a Ritchey Scuzzy Logic 1" threadless headset with sealed cartridge bearings.

I have no problem with going forward a bit with technology, and am happy to try sealed cartridge bearings rather than loose bearings. Although, I will admit that my old Colnago has decades old loose bearings, showing a lot of wear, but still seems to ride nicely.