At one point in time, it was a smart move to buy a bare frame, and finish it with the custom parts you REALLY wanted. It made more sence than buying a gun only to toss half the factory parts into the drawer.
Now, the factory STI or Kimber guns are every bit as good as the old custom, and cheaper to boot.
I ordered mine from Gunnar at Armco, and had a trigger job done in the process. My cost was half of what my Caspian Race Ready cost 8 years before.