I own a very nice early Masi 3V with Super Record Equipment. In following both eBay and postings on the CR list, I've become confused by the plethora of Masi frame types which exist. It's clear that the Gran Criterium, Prestige and Special carry greater mystique (mojo?) than the Gran Corsa, Nuovo Strada and 3V. I'm curious about the differences between these frames and how those differences determine the relative desirability of these bikes? Rodney Handsfield in Boston