yes, PSU is enough: it’s a 550W unit (quality one) and GPU specsheet suggests 450W; draw is similar to the old card’s (178W vs. ~165W)

9060XT

No, my audio output comes directly from the motherboard

I can also vouch for PoP_OS!, get the .iso with baked-in nVidia drivers and you will have no problems. The biggest issue I’ve had so far is that sometimes, after updating graphics drivers, FPS get stuck at like ~10 and I need to reboot. But happens rarely, and it takes ten seconds to fix