I own two CZ pistols, a 75B (traditional DA/SA w/ manual safety, "cocked and locked" capable) and a P-01 (decocker, first shot DA).
First of all: Holy cow, these are good pistols. I have about 2,600 rounds through the pair, without a single malfunction. Quite accurate, excellent ergonomics, good looking, durable, fairly priced. Great guns.
For concealed carry close to the body, I would lean to the decocker models - or use one of the traditional DA/SA models, but carry it with the safety off and the hammer lowered to half-cock for a DA first shot. The manual safety on the traditional CZ 9mm and .40 pistols is reliable but not quite as positive as I'd like. Handling could cause the safety to be wiped off and you might not hear a "click" or other clue. Unlike a 1911, you don't have a grip safety or other backup on the CZ when carrying it cocked and locked. Just the manual safety. (I actually prefer the .380 caliber CZ-83 in this respect: it does have a very crisp, positive manual safety, different mechanics from the safety on the 75-series.)
However, for home use, car use, or open carry with a hammer-strap holster (1911 style), the traditional CZs (DA/SA + safety) are preferred. All else being equal, I want that light single action trigger for the first shot.
Interestingly, although I almost never fired my CZ 75B double action during its first 1,500 rounds, it broke in to have a smooth double action trigger. So far it's better than the DA trigger on my P-01 (which has 700 rounds through it), even though the DA is mandatory for first shot on the P-01.
So I now often lower the 75B's hammer to half-cock (careful! but no problem with practice) and keep it in DA first shot mode.
Let me close by stressing again: these are great pistols.