I love many aspects of nearly every group; Superbe Pro (building up my Look Equipe for Eroica), Sante (got a whole NOS groupset and searching for a perfect frame for it), and I built up my beloved Masi with Tricolor,
This will get some groans for not being vintage enough, but the most beautiful groupset to me will always be Dura Ace 7800. It's what C-Record was trying to be.

FFS, its 20 years old. Is it still not vintage enough?