Who makes the modern Torelli frames? I've heard good things about them, though IIRC "Torelli" is an import brand for Italian frames like Italvega was back in the day.
http://torelli.com/shop/spettro/
the "modern" Cinelli Supercorsa is a hot looker as well (though apparently Cinelli also contracts Italian framebuilders to make their modern made-in-Italy steel bikes). Pro tip: get it in white
https://www.cinelli-usa.com/supercorsa-frame-set/
also if you really want to go deluxe (since you're shopping for Colnagos and De Rosas) and price isn't an object, you should really spring for stainless steel (Reynolds 953/Columbus XCR). Cachet of titanium but much, much rarer. I see titanium bikes in the city very frequently (they're popular among the young nouveau-riche techie set), but I've never seen stainless.
http://torelli.com/shop/il-30/
https://www.cinelli-usa.com/xcr-frameset-magic-mirror/
(that Magic Mirror XCR is so hot, if I was rich and retired)
edit: apparently people seem to think Torellis are currently made by Cicli Barco. To be honest, something like that is my recommendation, especially if you live in Europe. Lots of people have Colnagos, but not too many people have custom-made frames from small Italian shops anymore
http://www.ciclibarco.it/?portfolio=prova-prova