I would build it up with decent components, then opportunistically upgrade to "correct" parts as luck and budget permitted. I have to concur with Kurt regarding the desirability of certain anachronisms, such as stainless spokes, KoolStop brake pads, and modern low-compression cable housings, but I am looking for something to ride and to enjoy, rather than for wall art.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069