I've heard a bunch of the top end DACs that are in that price range and much more, and in no case were they anywhere near worth an upgrade from M-Dave.
And I suspect I'll feel the same even about Chord gear: even though I'm fortunate enough to be able to afford whatever, at that price it better represent a "night and day" improvement that even the deaf, broke cultists in ASR/Sound Science could hear.
However, If Rob pulls that off (and I seriously hope he does), he's unquestionably the very top of digital audio designers/engineers.