The CZ 455 might be easier to find, and I don't really recommend getting multiple barrels for it. I don't think it would be consistent changing the barrels. And it's an excuse for multiple rifles
The CZ 452 would be a better choice if you can find one.
My 455 will overlap holes at 25 yards, and at 100 yards I can achieve sub-MOA with match ammo. It's far more accurate than I am, and it's great training/practice.
I don't shoot at paper too much because it's so much fun to lace rounds out to crazy distances at steel. I'm getting offset rings this week so I can try reaching out to 400m.