Unfortunately, my agency, like most others, requires us to carry what they issue to us. In my case, it's the Sig P220ST. To put it bluntly, I absolutely DESPISE that gun, and have found it to be about as trustworthy as a Democrat's promise. If given the choice to carry whatever I wanted while on duty, I'd happily go with an option you didn't list: Either a Ruger P-90, or perhaps the slimmer Ruger P345.
Seen on a bumper sticker: "Exercise. Eat right. Take vitamins. Die anyway."