For the models you pointed out, you would be pretty well suited on any of them. IHO, spend a little more for a SA, SIG, STI or Ruger over the budget 1911s. I have shot a lot of the different variations and wouldn't say there is anything wrong with them, I would just spend the extra couple bucks and go with a company like STI where you know they will take care of you after the purchase. But like I said, just my opinion.
At that price point you will probably not notice much of a difference in performance of the gun. The Sig will have an external extractor on it just as an FYI. I would then look for things like what type of sights etc. If you go with just a standard model with a post front sight and standard dovetail rear sight you will be limited on potential upgrades later.
Don't get to hung up on brand, the point is that you are doing the Red Blooded American duty and adding your first 1911 to your collection. Trust me, you will get hooked and purchase more of them down the road!