I usually run Sedis/Sachs narrow chains on most of my bikes in either all silver finish or black and silver alternating links. They are very quiet chains as long as you derailleurs are properly trimmed and adjusted.
I do have one bike with a Regina America Superleggera chain. Beautiful lightweight chain and just as quiet as my Sedis/Sachs chains.
Pretty much now run all my bikes on narrow chains. I don't really feel a difference between them and regular width chains, when running them on 6 speed clusters.