I'd go with DDR5-7200 CL34 or better. G.Skill Trident Z5 RGB and Corsair Dominator Platinum RGB have served me well. If budget is tight, Kingston Fury...
@addss2 Also recommended this case.
Just pre-order the LG 65 inch C5 OLED, hope shipping soon.
Amazon link is live now, you can pre-order it now:
@madman Just bought a 65 inch one. When is the shipping date?