I had to go Sig on this one, despite the fact that I'm a die-hard 1911 fan. I don't even own a Sig, but I vouched for them this time, because IMO the greatness of the 1911 is in the details. Throw nightsights and extended controls on that 1911 and I'd be all for it. When they're both stripped down to the basics, I say Sig based on the good feel in the hand, excellent controls, and reliability (all personal preferences, I know).
Didn't consider the CZ becaue I have yet to try one that takes to me.