The USP is a great .45. I do not know if you care about weight, but, if not there are some others that might work out. The baby eagle is a good shooting .45. Alot of the Kimber .45 1911s have great triggers, but lack on the high cap., unless you go with the BP10-2, and I do not know if youll like the hand grip, although you may, Im not fond of it. Also I like the SIG P220, that is a nice .45.
Will this be a carry gun or target gun? Or both? I think your best triggers are going to be 1911s, a good Springfield, Colt, or Kimber will do fine. But, your best HIGH CAP. will be Glock, SIG, H&K, or even a CZ. While accurate guns on the other hand, are in the eye of the be holder, and the hand of the shooter. I know people that cant shoot a 1911 to save there life, but, are awesome with a DA Glock. I think you have to find what one you like/feels the best.
Dave.