Glock is #1 in SSP but S&W Plastic M&P is doing well. The P.M&P Pro with Burwell trigger would be my first choice.
Real DA-SAs are down the list, you can do ok but the crunch-tick will take extra practice. I have shot a Sig-Sauer GGI P226 and a CZ75.
Yes, it is allowable to manually decock a CZ. The SP01 is a good gun but the weight and dust cover monkey motions to get it entered just aggravate me. An Angus Hobdell action job and sights on a regular CZ75 or 85 would be less tedious.