I did carry a 686 on duty for a short time, so it'd be my choice. It's sort of a comfort zone for me. I started shooting on an old 686 (before they had dashes and plus signs) and a 586, and even today I still shoot my revolvers better than my autos. There are a couple of autos I'm just as proficient with, but they aren't on the list. Even still, I like the .357 mag and have shot tons of it, more than anything else aside from maybe .40 S&W. Even with the choice of autos, I'd probably still prefer my old 686 or GP100.