“I want a streamer that has a walnut wood case…”
<lots of replies telling the OP he should get a plastic or metal chassis…>
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Anyway, the challenge of made in the USA is tough and I don’t have much else to add. You could get a Mac Pro, a rare made in the USA computer and run J.River or a made in Japan VAIO laptop and run J.River. It is easier to find US companies that are assembled overseas.
The Sonos Port is currently made in Malaysia but the heavy lifting of the design and software engineering is in the USA.
Marantz SACD 30n is made in Japan, but the profits funnel to Masimo, a U.S. company. There are no balanced outputs on the 30n but it does utilize the algorithms from the SA-10. Build quality is exceptional given the price point and economies of scale. Both should have pretty good user interfaces.
DTS PlayFi products like the McIntosh MB50 are not quite as nice to use and the MB50 isn’t as high end as other products but it is a good option for assembled in the US.
If “quality” is something you are after and are more flexible about the country, Bryston is great as noted. Don’t forget about Linn, made in the UK.