The DAC is my main audio system right now is a PS Audio Digital Link III. It was in storage for a while and might be headed back. It's a fine DAC to my ears, but the reality is I don't have many files. I also don't subscribe to Tidal, but I might start. I'm still playing CDs on my Rega Saturn and prefer it. I like the sound of it better than what I get playing FLAC files from a Windows computer to the USB input on the DLIII. But let's suppose I subscribe to Tidal and rip my CDs. At what level of DAC do I get solid upgrade? Do I stay with USB for convenience or do I need SPDIF output? Any discussion at any level is welcome. I probably wouldn't spend more than $2,000, but I'd go with $300 if it's actually an upgrade.