I went through the same headache trying to find a screen for Valo last month. Settled on the ViewSonic OMNI XG2431 24 Inch 1080p 240Hz and im super sa...
Get AMD Ryzen 7 9800X3D.
The RTX 5090 is a beast of a card, so you'll want RAM that can keep up. I'd recommend at least 32GB of DDR5 RAM, clocked at 6000MHz or higher. Faster ...
For the RTX 5080, I'd recommend the Intel Core i7-14700K. It's right in your $500 budget and has excellent gaming performance with 20 cores (8P+12E). ...
9800X3D or 7800X3D.