Description: i have decided on video card type and cpu, just need some help with the rest
Budget:2k-3k
More specific use (what games, what programs): general gaming d2r/d4/poe/new upcoming stuff, some music recording/mixing
Planned time until purchase: now-6 months
Do you need an Operating System?: no
Do you have any specific preferred components?: AMD Ryzen 9 7900X cpu/Radeon RX 7900 XT gpu. (unsure of brand/version) unsure if i can/will reuse case (lian li lancool II mesh atx mid tower) and psu (corssair hx platinum 850 full mod atx)
i do want 64gb ram and 2tb ssd
Do you need a sound or wireless card?: have a wifi usb stick/can run wired if i needed to
Do you want stock cooling or do you plan on overclocking?: unsure if i need to/want to go to liquid cooled or not
Do you need a monitor? mouse? keyboard?: nope
Zip code/location? (Shipping costs): 93907

You can reuse case and psu. Just make sure the new motherboard is the same form factor as the case. In regards to your ram, 64gb is most definitely overkill for 99% of users. From your described use case, 32gb should be plenty. There is DDR4 and DDR5 ram. Most people come to the conclusion that DDR5 is just slightly better than DDR4 performance wise, but comes with a much heftier price tag. Your motherboard also needs to be DDR5 compatible, in which those are generally more expensive also. As for the wireless card, most mobo's come with built in wireless cards and are relatively cheap.