I know you said you did not need a DAC but at your budget, the Lumin X-1 is a tremendous DAC/Stremer and very easy to use. It is not built in the USA but I have had 4 of them.
If you want an end-game music server, please look up Lucas Audio, Ok, they are based out of Poland and the UK but their music server is incredible and Lucas Domansky, the owner is a computer genius and offers 24/7 service. If nothing else give him a call on WhatsApp. You will be convinced after talking to him. Even though I now have a Lampizator Pacific DAC, the Lucas Audio Music Server is the component that took my system to musical bliss.