Prime day music production pc

I'm looking for help putting together a build from Amazon and Best Buy. Primary use will be music production with Reaper/ProTools, Superior Drummer, synth VSTs, etc. Secondary use will be gaming. Fortnite, Marvel Rivals, Mortal Kombat, etc. Not planning to run AAA games, but if I do they'd be a year old( or more) so nothing cutting edge. Would like 2k 144hz capable. Here's where I'm lost: I'd like AM5 but not sure on 9000 from the start or 7000 and upgrade in a couple years. Do I need X3D for the gaming? Not sure if I need 850/870 board or if 650 would suffice. Looking at Nvidia GPU in case I want to tinker with stable diffusion at some point. I'd like RGB in the case with front to back airflow so I can put it beside a wall but still see the fancy internals. I'm thinking to go bigger with the PSU to future proof a bit (850w?). Would like to stay around$2k, but could go to $2500 if it makes a huge difference. Otherwise I'll save that cash for upgrades in 2-3 years.