I like most of your choices, although I'd try to stay all-one-brand-ish looking in the drivetrain and brakes, and I prefer Campy, so Cuda's suggestion is good. That might be a tough to source as a new gruppo, tho.

I think you could find a mix of recent silver Veloce and Centaur that still has a classic look.

I just bought a near-full Veloce 2008 gruppo for cheap at PBK.
Icycles had Centaur calipers for a steal, and also has a Record square-taper crank.
http://store.icyclesusa.com/shared/S...asp?RowID=1315