I own a Sig 226 40 Cal. I was introduced to them when my brother became a federal agent . They carry the 9 mm. I love the way the handle and feel. I think more agencies should look away from SW, Glock and such and look at the Sig.
I like the glock, but i think that some aftermarket add ons are a must --> a new guide rod, mag release & extended slide release. Both mag & slide releases should be ambidextrous as should all duty weapons (as well as tritium night sights)IMO. I like sigs, they are of superb quality and I am really fond of the H & K.