> now I understand (hopefully correctly) that there are two kinds of jitter - converter (difficult to measure), and data (measurable in a DAW). <
No, there's only
one kind of jitter - the kind that is inaudible. Really, it's a big ho-hum who-gives-a-crap non-issue. If jitter actually mattered you'd see it expressed as dB instead of picoseconds, and the levels would be within an audible range. Like hiss or distortion that's 90 dB down or whatever. Jitter these days is typically 120 dB below the music, and present only while the music plays. So who cares? You can't hear it. Nobody can hear it.
Sorry for the rant.
I just hate seeing people spend money and waste time on stuff that doesn't matter even a little.
--Ethan