I would agree with Damien on upgrading the SSD. Samsung pro (not evo) are good too.
Consider strongly getting 2 (good ones: NVME-PCIe4). One for OS and one for Astro image processing. You only need a 1G for OS but get a 2G for astro
go for the 5950x, twice the cores. Cores are what will get you the most boost in your workflow. When grinding data I can afford to wait most times rather than walking away from the PC for a "while"
I would recommend an AIO cooler (3 fan). Arguable quieter and generally better.
10 fans! that's the spirit! You might need a fan controller to tame them
that MB is very exe (IMHO), unless it has something special you need?
https://www.umart.com.au/product/gig...herboard-60113
Also you may not have considered a monitor:
https://www.umart.com.au/product/sam...90uqexxy-44162
Get 2 if you can - my old man eyes love mine
Get a larger case rather than smaller if you have the desk space, the more cat swinging space the better. Try not to keep the PC on the floor, they suck heaps of dust on the floor (relatively)
With you penchant for loud palettes I'm kinda disappointed you didn't go full ARGB
