I can add that:
1) It may be tougher (or even more expensive) to procure a z690 ProArt MB. Plus, if you DO find a z690, you'll want to upgrade its firmware to allow for a 13th-series processor, if it hasn't been already. It's not rocket-science, but it's definitely a bit of a process if out-of-the-box it's not compatible with 13th-series. I did it on my first build (z690 ProArt with a 13700k). I do find that system is perhaps a tad less stable than the next one I built which is a 13900k on a z790 ProArt. THAT machine (the one I'm typing from now) is an absolute gem. I'm still on the BIOS it came with (0814) BTW. I would not hesitate ONE BIT to instead build with the z790 using this guide!
I run dual-boot Win11 on BOTH aforementioned machines and it's wonderful -- a far better experience than Win10 on my z390s, simply select Windows instead of Mac in open canopy and go!
As far as GPUs, ACT FAST! I would imagine a 6950xt will be easier to find than a 6900xt, and you'll definitely have to Device ID spoof a 6950xt from what I know, and you 'might' even have to spoof it even its a 6900xt but non-reference. As
@CaseySJ said, it's easily doable... if I can do it, you can! Or -- per the comments a few up from this -- wait and see if a 7900 can be a go.
Choose carefully on memory, as it seems to have been an achilles heel on these generations, and if you want 4 sticks or larger than normal capacity, pay extra attention.
Final note; consider an LGA 1700 contact frame. I bought a Thermalright from Amazon for like $15. Many many people say it's not needed, but I chose to use one anyway.
Good luck,
j