Interesting opinions. Not one person thought the full panto'ed Merckx should go, and that was the one I was leaning towards. The most votes went to sell the Rossin, which is really an exceptional bike in a lot of ways, and very different from the Merckx/De Rosa fleet.
For the time being I am going to keep them all, and see if I can continue to justify having that many. I may reshuffle the line up, as far as what bike lives in Michigan and which gets to live in Arizona.
I have a feeling that at least some spare parts and wheels will be shed very soon.