There are talented engineers around the world so I wouldn't use nationality as a criterion, except where the country has very high labor costs reflected in the price. Some producers may use counterfeit parts especially in the crossover. Caveat emptor.
Chinese DAC's
I have been looking at several DAC's trying to decide which one to put in my system. Some of those DAC's I'm looking at are built and designed in China. Without getting political I don't think trade with China will ever be the same. I hope that these engineers are able to get there products to market. It would sure be a waste of talent.