I shot the Sig C3 yesterday. One of my friends owns a dozen or so 1911's, including the Sig and brought it to the range to play. Accurate, oh yeah, real easy to eliminate the 10 ring from the target. It was my first time shooting the C3.
Good trigger, great sights. No doubt a good carry piece with the alloy frame saving a few ounces. However, I still prefer an all steel frame, guess I'm just old school. I like the pistol to absorb as much of the recoil as possible. JMHO
One thing for sure, you get one 1911, it just opens the box and you want more!
My daily carry piece is a STI Spartan, all steel. Here's baby: