My Colt manufacturer of choice............ that's a difficult question to answer. There are many factors that impact that decision. I have numerous C&B revolvers made by ASP, Palmetto, ASM, GLB, PR, Gregorelli & Uberti, Ruger (only 2 so please forgive me), Pietta, Uberti, and Colt's that were made from the 50s to the recent past (2012). I do not own and have never owned any Sig Series Colt's; so, I can't comment on them. For sheer beauty, it would have to be the C series 2nd Gen 1851s and 3rd Model Dragoons. The quality of the fit and finish, the deep Royal Blue, and the real case colors just can't be beat. For shootability, first choice would be my 2007 vintage consecutive SN Uberti 1861 Navies. They shoot POA out of the box, are easy to load, and have fit and finish comparable to the F series 2nd Gens. Uberti 1851 Navies and Navy Arms Frontiersmen run a close second to the 1861s with a pair of C series 2nd Gen Navies close behind. Pietta makes some really nice revolvers that can be had at a good price and are smooth and accurate. I have a pair of short barreled 1860 Armies that work well in CAS. Current Pietta offerings from what I've seen are pretty good OOTB; but I wish they would use a more correct grip profile on the Navies. ASM made some nice pistols in the 80s and 90s. It wasn't till they got screwed when the Sig Series Colt's production ended that their quality went down hill. I only own 2 ROAs and have only used them in one match, so will not rate them. I think they are too heavy and they're not Colt's repros anyhow. If I was forced to rank my C&Bs by manufacturer; I guess it would be:
2nd Gen
Uberti
G&U
Pietta
ASP
Palmetto
ASM
GLB
PR
............... but, I could be wrong