It's funny...
I have lots of 1911s, and HiPowers, and a couple of CZ-75s, and currently NO Sigs.
I'd pick the Sig P220 in zero seconds flat if I could only have one auto pistol. Never met a Sig out of the box that didn't at the very least shoot straight. The 220 is a little big for a single stack, but light enough to compensate for its size, and reliable enough to be the ONE pistol in this case.
Maybe I should buy one again. I haven't had a Sig for years.