Pretty sad that you already have a great streamer in the Auralic Altair G2.1, but it has no digital outputs. That sux. The Holo Audio May DAC has two I2S inputs. While the USB is obviously a good way to get digital data into it, I'm sure you might always be questioning if the sound quality might be a touch better using I2S, so I would look for a streamer in your price range that offers I2S output. You can use the presumably better clocking circuit inside the Holo May with either USB or I2S. Good luck.
