I'm of the general opinion to suck it up and carry a service sized weapon unless working true NPEs.
That said, I prefer the PPS M1 to the 2.
Does the thickness really matter that much? I know the CZ is a little chunky, but how much do you truly gain going to a single stack? Would it be that much more inconvenient to carry a fight worthy gun like a G26 or an HK P30sk?
If single stack is really what you need, I'm fully in the JAD camp of a CCO in 9mm; only problem is you'll be talking dropping north of a grand for a DW or better...