All the PC parts should be compatible on paper but if there is something standing out please let me know. Or if there is a better alternative that I am not aware of, I would love to hear your thoughts. Thanks!
PS. The 6750xt was $379 just yesterday :( Missed my window.
You can get the 8th best card, the 6950xt for a little over 600$ though you will need to go up to 1000w for the power supply.
You could also go with the 6800/6850xt or Nvidia's 3080 or 3090 since last gen has good discounts.
I don't like going Nvidia but it is an option you can take.
You really just need to pick a price. Something that helps is your use case. If you're going 1440p 165 hz that 6950xt will last a long time. If you're going 4k you will have less legs on the card but it'll still handle a lot. If you're going 1080p you are probably fine with the 6750xt