I admit, I am prejudged: I like stainless. I also like .45 Convertibles, in stainless, with 5 ½” barrels, a configuration Ruger seldom makes. What I have done is buy 7 ½” SS .45 Colt NMBH and send them to the factory for a 5 ½” barrel swap and a .45 ACP cylinder. I then took them to a gunsmith and had the cylinders trimmed about 0.030” so I could load .45 Auto Rim as well as .45 ACP in the .45 ACP cylinder. Mine are a few years old. They had tight chamber throats and usually had bad forcing cones. After I fixed that stuff, they shoot very well. I understand the new ones may have had these problems corrected by new tooling in manufacturing.
I also have one of the 5 ½” SS .45 Colt Bisleys. It is a nice gun, but I find I prefer the grip of the NMBH over the Bisley grip. Just a matter of personal preference.