Before you purchase, read this.
http://modernserviceweapons.com/?p=3250
Ok, once you have read this and you want to commit to the 1911, here is my thoughts, as an 1911 fan and user. You get what you pay for most often and most often to get it where you really want it, you are gonna send it to a quality 1911 pistolero smith to work on it to get it right. However, once it is right, it is pretty awesome. INMO you cannot beat a tuned 1911 trigger.
I would go the Sig or S&W of the choices you presented. Kimber in my opinion has fallen off in the last couple of years. I would suggest that some of the higher end Springfield's aren't bad choices to consider, the Range Officer and Trophy Match models are good places to start. With any of them you are going to want to get quality magazines, I run Wilson Combat 47Ds religiously.
Look for the options you personally want in the gun, Novak vs Bomar Sight cuts, triggers, beavertails, ambi safeties, gi controls, match barrels, match bushings, with or without full length guide rod, stainless vs carbon frame etc. Once you narrow this list of priorities then you can starts whittling down the options within your price range. I would also hand examine the exact gun that you are going to purchase, look at the slide to frame fit, does it wobble on the rails? barrel lockup, tightness of the bushing, tightness of gun. BTW if you want feel a tight gun go pick a Les Baer. 1911's to be built well require good machinists and skilled smiths to fit. Hence why Wilson, Baer, Nighthawk cost more.
For instance, I prefer stainless steel frames, standard GI controls, no ambi safety, and no beavertail, GI guide rod, front cocking serrations. I wanted Novak front and rear sight cuts to accommodate a tritium front and 10-8 performance U-notch rear. So what did I do? I bought a Remington R1, and sent it a smith to get all the work I wanted done, milling, trigger job, de-horn, and accuracy job, and it is the last gun I will ever part with.
To me the 1911 is an enthusiast platform, you run it because you want to and you like it. You deal with the hiccups and maintenance issues because you are a fan of the platform. Have fun. Just my 2 cents.