It depends on what you're using it for and whether affordability or practicality is the major selling point. I own one of these rifles too, BTW, and I love it to bits although occasionally I wish I'd got a heavy-barrel version. (I wanted the iron sights as backup, and the varmint barrel didn't have that option.)
Used mostly for rabbits these days, mine bears a 2-7X variable (a relatively inexpensive Nikko-Stirling, concerning which I have no complaints). 4X is about the middle ground there; so if hunting is your game and fixed scopes are your thing, you're not doing too badly there. I used to punch paper targets with my CZ at 50m or more, and for that I had a 6-24X variable, because I found being able to spot my shots through the same scope I was shooting with was too convenient to refuse, and saved me buying a separate spotting scope.
Good scope for a CZ ZKM452 2E STANDARD? 
