I had a SIG Traditional Tacops and used it for a couple USPSA matches and was a great gun. Right now I'm playing Single Stack Minor with a Wilson Combat CQB with dawson ice magwell and front sight.
For the 1k-1.5k ish range I suggest the Springfield RO, Springfield Loaded, STI Trojan, Sig Traditional Match, Sig Max Michel model (already comes race ready but you might prefer different basepads as the Wilsons fit flush with the Ice Magwell). Another option abeit rough is a Rock Island FS 1911 with Novak dovetails so you can slap on some Dawsons and a magwell of your choice. You'll have extra money to spend on quality mags and even more ammo.
Lots of great options!