Well HH, strictly by my way of thinking, given that both EAA and Taurus have bad reputations for poor customer service, which means they get sent back often, and given that parts for them don't grow on trees, I think I'd go with the Sigma if you can learn to love the trigger pull and it's not one of the older ones. It's a Smith and everybody and their dogs will be making mags for it, and parts are usually just a call away. Same for holsters and mag pouches.
Be aware that the Sigma pretty well blew it in the police market in its earlier versions....it was a real jammomatic..... but Smith reengineered it and from what I've read from users on the gun forums recently I wouldn't be afraid of one if, like I said, it's a newer one. IMHO. Best of luck in making your selection.
If I may answer a question you didn't ask, be careful about putting a huge round count on a gun you might want to defend yourself with. Once it starts moving into the beat-to-crap stage, get something else for defense. Sorry, I'm a retired cop and instructor and things like that worry me. Couldn't help myself.