Personally, I’d stay away from the 600 series. I own three of the previous model, the 527 mini-mauser type action, in 204, 17 Hornet, and 22 Hornet. They made a variety of that model in 223 as well. The 527 is one cool action and my three guns are very accurate.
The 600 series was supposed to have a simple barrel change feature. I think this was for Euro customers that had to get permission to buy each new gun, but they could buy barrels without paperwork (or something similar).
Anyway, either there was an engineering mistake or the potential liability of a user mistake was too great so they recalled them. Now the barrels are bonded into the action so you cannot change them.
I think CZ destroyed their centerfire lineup.