If you don’t mind the small risk of a technically unsupported solution, I’ve had great luck with the GMKtec N97 hardware. I posted about it here:
Price seems to fluctuate; they were $143 so yesterday. $162 in the US today with 10% coupon. Either way, still a good value. The current ROCK image works perfectly and is very easy to install. No BIOS updates or changes required.
This mini PC does have a fan, but it’s quiet generally quiet. I recommend just stuffing it behind your Internet router and using more purpose-built audio components, like the WiiM Ultra and similar in your audio system.
Edit: - you can still grab the black model in the US for $136.79 after 5% off coupon:
https://www.amazon.com/GMKtec-mini-computer-small-pc-n97/dp/B09Q8Z6VB7/