To be quite honest: You would need to wait for the Z9J to make the rounds and allow professional to get their hands on the TV and post their reviews. I was not very impressed with SONY's 2021 TV line up - except for the
A90J (OLED) Master series TV, and the fact that all TVs are now moving to the Google TV Operating System.
The whole Sony Cognitive Processor XR talk seems to be a lot of Marketing nonsense. SONY's attempt to use buzzwords like AI and Machine Learning which are very hot technologies right now. The new 8K TVs does not even incorporate Black Master Drive technology which made the Z9G the very best TV ever made by SONY.
I am not sure if you can even get a SONY Z9G anymore - perhaps an open box, return, or floor model. However, If you are like me - early adopter which translates into spending top dollar for these new devices - I would wait at least a couple of months and read every review available.
I am more excited about the Panasonic OLED PRO monitors are once again available in the US. Although, I hate the fact that they're only available in 55 and 65 inches. These are hand picked OLED panels made into Panasonic Hollywood Professional Client OLED Displays. You should read about them if you are looking for the very best display and don't mind that they are only available in the aforementioned sizes - link below:
Panasonic Hollywood Pro OLED Display
Just conduct your own research and learn about these technologies before pulling making such a significant purchase. And, make sure to always have the option to return the TV within a 14-30 day period.
Good Luck to you.