I have a P-09, very accurate pistol. I'm completely incapable of leaving them alone, so I don't really remember what the stock trigger pull was like but a nice trigger job is a very easy DIY project. Stock sights are pretty awful three dot affairs with glow in the dark paint, but no worse than stock Glock sights. Dawson Precision makes very nice sights.
Down side is the trigger return spring on CZs. They have a tendency to break, so if you go that route you'll want to add replacements into a periodic mx schedule. Mine broke around 5k rounds, but I dry fire a lot, and was taking the spring out a lot screwing around with the trigger.