Provided all things equal (meaning they work), my favorite goes to the Kimber. As an all around company however... Springfield makes my favorite 1911 from the three makers, the PRO. But that's outta the price range. Strictly speaking mass production 1911s, I prefer Kimbers. IMO they feel the best in the hand, fit tighter and in my hands shoot a smidge straighter.
Colts are nice, but the slide to frame rattle bugs the bejeezus out of me. Yeah, it doesn't affect accuracy, and it doesn't make it any less of a gun... but it's a personal gripe.