Hi Bob…. I have upgraded to a DS2 from a DS……I stream from an Auralic Aries G1 to the DAC. Via USB. I used to use a USB Regen on the DS….until the Regen died. So I’m straight USB to the DS and now the DS2. The DS2 does USB Way Better than the DS did. Most have found the USB input from a decent source to be on a par with the I2S inputs. I’m loving Qobuz via the Auralic to the DS2. I wouldn’t worry about the USB Regen anymore.