I've been there myself mate.
I've bought a couple of guns when I shouldn't have. It really "irks" my better half, to say the least. I can't complain too much though, I got a browning Hi Power for Christmas and I'm going to L.F.I. this year.
The reason I mention the above is so you understand that I have been in your shoes and understand. I had to pass on a Rifle I've wanted for over ten years, and more than three handguns last year, but it's a good trade because I still feel I have a great wife.
As far as which gun to keep. I would look at it like this; which gun would you want for daily carry, home defense, target shooting? Which gun go you shoot better? Which gun feels "right" in your hand? I myself like the Hi Power and the 1911, and to me a CZ is a cousin of the Hi Power, so that's the one I would keep. It wouldn't even be a question, in my mind, if it has single action cocked and locked capability, but that's just me.
Ask yourself those questions, and then make your decision.
Biker