I own a Beretta 92A1 and a Browning Hi-Power, and I handled a CZ 75B SA in a gun store. Based on my research (not having had an opportunity to fire one), I was all determined to buy the CZ if I liked the way it felt, the day I walked into the gun store. When I picked it up though, in comparison with my BHP, I wasn't particularly impressed with its ergonomics or its trigger. The BHP's trigger isn't great out of the box either, but can very easily be made good by removing the magazine disconnector. I can't speak to how well the CZ shoots, but the consensus seems to be that it is a great shooter.
Between the Beretta and the BHP, there's no contest. The Hi-Power is a true masterpiece of ergonomics, and I have never held another handgun that feels so perfect in my hand. I've put over 1800 rounds through it since I bought it, and the only malfunction I had with it was a single failure to feed on the very first magazine I ever loaded into it. Once it broke in, it has fired flawlessly.
The Beretta 92 (any variant) is a really well-made, exceptionally reliable (I've never had a single malfunction with mine), and very accurate gun. What I don't like about it is that it is ridiculously huge for a 9mm pistol. I would never seriously consider carrying one concealed (though plenty of people do with no problems), though I have no problem concealing my BHP.
Any of the three choices would be a fine handgun to own, depending on what you want to do with it.