Don't overlook a mixed tubeset frame with a Columbus or Reynolds 531 double butted main triangle (see my signature -- both the PKN-10 and the Bianchi fall into this category). These tend to be much more affordable than their thoroughbred cousins (PX-10, Specialissima, etc.), but the difference in responsiveness and ride quality is negligible.
__________________
"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