It sounds like a fun goal. I sort of have the same goal for GA pedigrees but with a few caveats. The Allentown, Denver, River City, and Rockford collections all have page quality that doesn't thrill me, so I'm not sure whether I would want to include those. Also, I haven't seen many Carson City or Vancouver books that would be a good fit for my collection. I hoping that there are some, though. (I haven't seen any lists of what books are in those collections.)
1 Bethlehem
1 Big Apple
1 Cookeville
1 Cosmic Aeroplane
1 Crowley
3 Dell File Copies (2 GA)
1 Diamond Run (Diamond Run is to pedigrees what Pluto is to planets)
1 Lost Valley
4 Mile High
1 Ohio
1 Pennsylvania
2 Promise
1 Spokane
2 White Mountain