The new CZ looks nice!
Glock 19 is sort of the industry standard. I hate to be that guy who says go Glock but they really are hard to beat for size and capacity in an easy to carry package. You might also consider a Glock 26 and simply carry a spare 15/17 round magazine. I carried a Glock 23 (same size) for many years and found it concealed well. But the Glocks are still to wide for me to prove rly use a tuckable holster.
Walther PPQ is another good choice. About the same size a a Glock 19 but a bit more rounded.