There's a lot to be said for somewhat old school 32 hole hubs for this application. These are fairly easy to fix and keep in true and they work. I'd go with a slightly wider rim though. Two rims that come to mind are the velocity A23 and the H Plus Son tb14 rims. The H Plus Son will look very sharp on a vintage bike,
TB14 | H PLUS SON
There is a lot of stuff on the web about the virtues (pros and cons) of slightly wider rims,
Implications of Rim Width - Slowtwitch.com
I'm running velocity A23s laced to shimano 105 hubs on my long distance road bike. They're pretty sweet with a lightweight 700 x 28c tire.