I voted Les Baer of the listed options. Baers are the best custom gun going for the money, and the quality of parts used and the level of fitting is far beyond anything you'll get from Colt, Smith & Wesson, Kimber Springfield (non-custom shop), Para, or Sig.
THat Said, RRA also MADE outstanding 1911s, but RRA has since stopped producing 1911s and the used market for them is rather sparse. Insofar as Brown goes, they make great guns, but you'll definitely get mixed responses from people as far as after sale service from Ed Brown is concerned.
Two entries on the list that are conspicuously absent are Wilson Combat and Nighthawk Custom. They are both at about the same price point as the Ed Brown, but their after sale service is head and shoulders above that of Ed Brown. In my personal, biased opinion, I'd say the absolute best 1911s out there are going to come from Wilson Combat.
There are also great guns coming from smaller custom builders like Luke Volkmann and Dave Berryhill, but based on my personal experiences, I'll be sticking with Wilson Combat when I opt for another upper end 1911.