Try a CZ P07 trigger, single action AND double action, then look at the sub $450 price tag and tell me that doesn't horsewhip any of the others (then again, the mag pricing is a bit up there and the other CZ mags don't work in it).
It is decided...I am going to get a Sig Pro. I have utmost respect for Sig as well as the other pistols. I think it will be a great choice because it comes with so many extras. I like the extra grip and extra magazine they added. I think it will be a great pistol for conceal carry. I think I will buy a CZ P07 the next time around in 9mm. Then after that a Ruger P95 with a decocking lever. I will eventually buy a Glock, but I will probably buy all of the pistols mentioned above and some others (namely Heckler & Koch, Bersa, Walther, etc.) before I finally buy one just to add to the collection.
You can never go wrong with a Glock I have the .40 Family except the long slide all of which I carry from time to time. But from your selection and your needs I would have to say the G23 would be the best bang for your buck DAO is perfect for personal protection .....