Hi, sorry i should have mentionned that nothing is bought yet, but i just saw the release for the R7 will be on 06/04/23 so I don't know if it's really worth it to stay patient, Intel is appealing, I would like to do a sustainable build.
With the exception of a few games (ie: Hogwarts legacy), you'll be GPU limited before you are CPU limited when running 1440p and 4k. Since you want the best of the best you'll want the 4090. But you'll also need the power supply to back that up. Start with a rock solid A tier 850watt. But 1000w would be better if you overclock.