I've owned two CZ's. Both 550's in .308W and .416 Rigby. Before that I had a BRNO 601 in .308W.
In my experience, you don't have to do any more to a CZ than any other rifle. You read a lot of internet 'info' about what has to be done. A lot of it is on American forums and I get the impression that being a 'foreign' rifle makes it a target for the few who have had issues. That internet buzz also generates income for those marketing CZ modifications. Like any rifle there will be 'duds' off the production line. Some very early CZ's had soft wood and of those, a few stocks split, hence the continued 'requirement' that they all need bedding and re-inforcement. Find out what needs to be done and what you want done FIRST.
Decide what you want to use your rifles for, how you want them to look and find yourself a proper gunsmith.
I took the .416 to my gunsmith. He found that is was very well beded and needed no work at all in that department. It gave no issues, shot accurately and is now in the Northern Territory shooting Water Buffalo for a new owner, without issues.
I did get the factory trigger adjusted down to a 2.5lb pull in about 3 minutes. It retains the set feature which I have never used. The factory trigger is very well made and precise. You just need a gunsmith who KNOWS WHAT THEY ARE DOING and it can remain on the rifle. If a gunsmith tells you it HAS to be replaced then I would have very severe reservations about that persons knowledge and craftmanship. I had the cross bolts changed to Recknagel items because they index easily and look better. No practical advantage was gained with this. The safety also works very well.
I had the bolt handle straightend and the 'knob' bent up and out a bit so it was easier to grasp in a hurry. Some people fill in the hole on the end for cosmetic looks. All my rifles have a 13.5" LOP and straight bolt handles so I don't have to adjust my memory for a different rifle.
Here is the straight handle after a re-blue and before the crossbolts were replaced.
The front bead was replaced with a white Recknagel fibre bead as well. I have ageing eyes and it just made my life easier. The standard one is a bit narrow and you don't want to go looking for it in a hurry if there is shadow or light changes across the rifle
The BRNO 601 had ejection issues. The CZ .308 had the standard trigger re-built with the set feature removed. It did however need bedding and the barrel floated. It went to Africa and performed very well except in a dust storm on the grass veldt where I had to strip out the bolt and mag and wipe it down to get it to cycle. (yes, we hunted hard and not from the back of a truck). My sons Parker Hale Mauser '98 in .243 kept working however without the need for field maintenance. Some designs you just can't improve on .....
I would like to re-inforce, find out what you have first before you spend big $ that you may not need to spend. Try to sift out the internet regenerating myths and clever marketing.