All 3 would get my vote but
...
I voted "other"; as all 3 are great choices, but, IMHO, you have to ask yourself:
All good for HD/SD but,
1. Will the gun be for range shooting, competition, only? IF yes, Beretta
2. Will the gun be for both range and CCW only? IF yes, Sig
3. If gun will be for range and CCW, but price is an issue over 600 bucks, CZ
Enjoy whichever you choose, none of them will disappoint you.
LS