$500 for a tube DAC, I’d go way back and find a California Audio Labs Alpha if you can find one. That was a nice tube DAC in the day and I bet will still hold it’s own today. The CAL Sigma was the model below and still decent but not as good as the Alpha.
Other option and new would be the Jolida Glass FX Tube DAC II. I’ve not heard one but Jolida’s always get good reviews.
Other option and new would be the Jolida Glass FX Tube DAC II. I’ve not heard one but Jolida’s always get good reviews.