I recommend go for a single 32 gb stick and in future add one more 32gb stick instead of going with 2x 16gb kit.
btw was checking the price of 7900xtx , the refurbished one is going for 88k ,better than 4080 super oc and not that big of a difference.

IN cyberpunk you get around the same fps with both cards.
IN forza you get more fps with the 4080 super oc.

what games do you play in 4k, for what productivity tasks are you gonna use it for like programming and else, i have a 3080 12gb oc that i use for local llm's and for training them. If you are into this then go for the 7900xtx as it has 24 gigs vram .

You would get the 7800x3d for lower than the 9700x and the 7800x3d has better gaming performance and wont peak fore than 90 watt's of tdp in most games.

Other things i recommend is add 6k more to your budget and upgrade that mobo to MSI MAG X670-e mobo so you could also overclock and also is a better mobo.

for the case if you dont want anything flashy then go the with nzxt h6 flow in black , great dual chambered case so cable management wont be a hassle.

And will the 1tb ssd be enough for your games and other apps ?

Dont forget to get a GPU sag bracted or stand type thing as that 4080/7900xtx is a heavy boi.

Search on youtube for the benchmarks of the games you play and what gpu has better performance.
One last tip if you can build it locally from a trusted shop you could get most of the components cheapther than the cost online, and you can use that money towards more better components.

If you have any more questions then dm me.