My favorite is the 686-4 series. I would accept anything that is -4 or less, but that is my preference. I have owned two of the -4 revolvers, and the one that I still have is a like new 2.5 in bbl model. I prefer the case hardened forged hammer and trigger that this series has. My current revolver has the old style cylinder release, but my previous one had the newer style cylinder release, and I can live with either.