Amen on the SunTour Cyclones, DiaCompe NGC brakes, Sugino Cranks, SunTour Winner Pro freewheels, and the SunTour Superbe derivatives thereof. I'm also a fan of Tange headsets in both conventional and cartridge bearing versions, for a mere $35.
Not as vintage, but I have a bike rigged with a complete Campy Mirage groupo from 1995 and am impressed (for the price) with its finish, durability, and operation.
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My C&V Bikes:
1972 Bottecchia Professional, 1972 Legnano Olympiade Record,
1982 Colnago Super, 1987 Bottecchia Team C-Record,
1988 Pinarello Montello, 1990 Masi Nuova Strada Super Record,
1995 Bianchi Campione d'Italia, 1995 DeBernardi Thron