I use my ET-3 plugged in via I2S into my Holo Audio Spring3 KTE DAC using a run of the mill HDMI cable. It sounds great. I like the I2S sound quality over using USB. I even like S/PDIF over the USB output.
I've never had any skipping nor any CDs that would not play.
The ET-3 doesn't read or play any DSD disks, but will upsample PCM or output DSD via I2S. With USB you cannot upsample at all.
It does recognize and play MQA disks, if that matter to you. I bought one just to see and it plays at 88.2mhz.
For the price it has a lot of features. The main plus is the top loading mechanism in my book. I have never streamed with it.

