I'm going to ignore one aspect of your criteria..... the 1911 part.
Get a CZ 75B or 75BD. You can shoot limited with the 75B loaded to capacity and cocked and locked, or you can shoot production with the 75BD loaded to 10 rounds.
You are getting into a platform designed for the 9mm, and for substantially less money than those Kimber 1911s you are looking at. The ergonomics of the CZ 75 are incredible, even more svelte than the 1911 in the hand. The CZ 'fits' the hand.
Triggers come from the factory less than stellar. Mine smoothed out with lots of shooting, and lots more dryfire practice. I went to a slightly lighter mainspring from Wollf Gunsprings, and it is fantastic in both DA and SA.
Incredible reliability. Most of the guns I have seen at our USPSA shoots are reliable. I have seen glocks go down because of mag failures. It was not a design flaw... the mag was full of mud and grit from a muddy 3 gun match at CMMG.
I have seen a few failures in an XD 40, but I think it was the guy's reloads.
My CZ has been VERY reliable.
I eliminated the magazine brake by removing it, straightening it, and reinstalling it. My mags now drop free... in fact they squirt out of the gun with gusto.
You don't need adjustable sights for USPSA. Especially on cardboard sights. The toughest accuracy requirements are racks of steel and occasional forced headshots. Most guns come with fixed sights adjusted well enough to shoot USPSA just fine. If they need to be adjusted, it is a one time thing.
Get yourself some Mec-Gar's and a CZ... you will be into the game and having fun for a lot less coin than a pricey 1911.
The guys out there shooting glocks are having just as much fun as the guys shooting STIs... probably more fun because of fewer magazine changes.