So what are some of your favorite quill stems for vintage bikes or new classic bikes with threaded forks? Any older vintage stems that should be avoided?

For pure aesthetics among vintage stems, I like the classic Cinelli stems like the XA, XE, 1A and Oyster. Also the 3TTT Record 84. On the fence about the ITM Eclipse, Cinelli Grammo and 3TTT Pro Corsa -- which all have a sort of industrial appearance. The old Salsa quill stems had a similar appearance and looked great on the right bike.

For currently available stems, the Cinelli 1A, Nitto Pearl and Nitto Deluxe are the nicest looking ones for me. Nitto Dynamic not bad either. I've mainly used Nittos because I need a stem with a tall quill. Also have used Profile H2O, which are ugly but convenient with removable faceplate. The Salsa SUL was another great stem in that regard but plagued with recall issues. Anyone know the story behind that?