What is the cleanest threaded to threadless conversion look?

[andy.mgnr]

I'm in the process of restoring and rebuilding a 1993 Ritchey Road Logic and looking to do a balance of classic looks with modern functionality, but the stem is the main bit I'm hung up on deciding. I'm hoping to convert to a clean and simple threadless stem (see below) that I will paint to match with my frame, but most of the quill adapters for threadless stems look ugly and out of place sitting atop a classic threaded headset.

Has anyone achieved a quill adapter/conversion that allows the look to be seamlessly cleaned up spacers and a standard top cap? Also would it look cleaner to go with a 1" threadless instead of the bulkier 1-1/8"? Open to opinions!