YoungPatriot,
I have 6 CZ's, one had the competition hammer installed from the CZ Custom Shop (Angus), the other 5 I did myself. On a strictly duty weapon, I'm not sure you would realize much benefit. However, if you combine practice, sport shooting, or competitive shooting, the trigger work could be of benefit.
As far as durability is concerned, I have never seen nor heard of anyone wearing out the hammer hooks and/or the sear on a CZ. It's possible (as it would be with any sear type pistol), but after thousands of rounds through my CZ's with the competition hammer, the only change I have noticed is a smoother, lighter action, as result of parts wearing in.
The difference in the action feel and function from stock to the installation of a competition hammer, hammer springs, and subsequent parts smoothing is simply stunning. You must experience it to fully appreciate the difference.