Unlike the new Sigs which use the cheaper MIM parts to save the money and increase their profits I would look into the H&K or Glock. Glock carries 65% of the police market for a good reason. They work!
HK and Glock also use cheaper MIM parts to save money and increase their profits. The Glock MIM extractor used in new Glocks and the associated problems with it is why I will never sell my Gen 2 Glock 19.