I went through this debate myself, but opted for the Beretta 92, and have been very happy with it. SIG people love to quote the KB stories, but when you have such a large volume of guns being used, any gun will malfunction, Beretta or SIG. If our guys were getting killed left and right, they wouldn't be using it anymore.
The deciding factor for me was that the SIG226 doesn't have a safety on it. When you have a round in the chamber it's a hot potato.
The M92 Beretta decocker (and most S&W semi autos as well) doesn't just de-cock the trigger, it disengages the trigger, so you have a higher level of safe handling with a round in the chamber, as the trigger won't do anything while in the decocked position. Had the SIG had this, I would have gone for a SIG vs. the Beretta, as I think the SIG is a bit more of a closed design against debris.