Kimber, Springfield, or older Colt. IMO, you should stay away from external extractors and recoil spring guide rods, as they are unnecessary modifications that only add complexity to a very simple, rugged and reliable design. I have 5 1911's, two older Colt's, Series 80, two Springfield's, and an Essex frame, Colt slide and GI internals that I built up in college 20+ years ago, because I couldn't afford a Series 70 Colt. I've shot two Kimbers, and feel that they're the top dog in production 1911's. Lots of gun for the money. If you can afford one it's the way to go, with the Springfield a close second. I would buy one, and may yet, but it's hard to justify another 1911 to the CFO. I haven't seen or shot the S&W 1911, so will withhold comment. My comments on the newer Colt products are not for family consumption, so that should tell you how I feel about them. SIG makes a nice handgun, but I've not shot or handled the model you've mentioned, so can't comment.