I have a Sig P229 in .40 caliber that I've owned since about 1997. Fantastic handgun. (It's for sale, by the way...) but it's a German frame from before the days they were made in the US.
Since then, I've been warned repeatedly by firearms trainers and Sig armorers about the quality of Sig manufacture since the changeover in 2003. Sig quality, or lack thereof, has been discussed a lot on a lot of firearms forums for several years now. Before buying a current Sig, I'd cruise the forums a lot, Google "Sig quality control", and investigate the issue.