A lot of people out there feel the Sonic Frontiers stuff is still right up there.
For me, a long time ago, I was with the two local guys who were building the Timbre DAC, and I have to say at the time it was the first digital piece I'd encountered that really struck me as something that could finally make the case against analog. Of course, I'd like to hear one today to see if that was just a feeling that was relevant for me at the time, or something that has held up over the course of my audio journey.