A few points:
While I respect the suggestion of the Ruger they do not offer a gun with a light rail, which is what the OP is asking about.
Now my opinion for what it's worth, on the specific models the OP asked about:
Not a fan of the Smith, I don't like outside ejector 1911's I like guns that use the standard 1911 operating system so upgradable parts are available.
The Sig does the non-standard thing too, they have a less rounded slide profile that effects their holster fit. I have heard they are reliable. But they aren't as tight or fitted as well as either the Kimber.
The Springfield is a nice gun and if it was the TRP operator, I wouldn't hesitate to recommend it. But the LW operator is an alloy frame (and from Brazil), great for carry, but a bit more punishing on recoil, and the frame itself. Also for all the complaining about Kimbers MIM parts, the Springfield is using as many or more and they are not as well finished.
The Kimber would be my choice, I've owned three, they are reliable quality guns. They are tight and require break in (but so does Wilson) None of the other guns mentioned challenge them for fit and finish (check the slide frame fit-Kimber approaches custom quality). And Kimber has been doing MIM longer than the other companies (ALL of them are using lots of MIM small parts) and seems to have the process down.
I agree with a few of the posters here that the Dan Wesson would be a nice step up, but it's almost 75% more (street price). The Springfield TRP operator would actually be a cheaper step up at around $1500 but it's still significantly more.