Well opinions are generally worth what you pay for them, but with that in mind:
From the list you gave, Springfield XDM or XD or S&W M&P. While a lot cheaper, I feel the Sigma is a clear step below those although it would do what you described needing it to do. I don't have as much experience with the Taurus guns, but from the experience I do have they are not on the same level either. The PT 24/7 OSS is pretty nice in theory, but I had a friend get rid of an early one due to problems. That may not be fair though.
The XDM is Springfield's latest and greatest, so to speak, but if you wanted a 5" length or liked the XD feel better (or found a significantly better price), I don't think you would be going wrong by not getting the M. The M&P's are solid, too, and probably feel the best of the three in my hands. To me it would come down to personal preference on feel between these three. Where are you located? If you can find someone with one and shoot them first, it will likely tell you all you need to know.
Of course when you are talking polymer framed autos, it is hard not to include the Glock models. If you have already ruled them out, that is fine, but to me they are on the same level as the XDM, XD, and M&P's, with a few advantages such as parts availability, among others.
That's my $.02, anyway.