I have listened to and lived with a number of high end digital sources including (owned) the top of the line Accuphase seperates, Audiomeca Mephisto II, Mark Levinson 31 and 30.5 seperates, Wadia 860, Wadia 301, Mark Levinson 360s (w Accuphase transport), Naim CDS2 w/ XPS and Burmester 001.
(auditioned) Linn CD12, Accuphase DP85, Audio Aero, Mark Levinson 390s, Electrocompaniet EMC1-UP SE, dCs Elgar and Purcell and the Meitner Emmlabs with the Philips transport (finally and briefly)...
They were all good and some of them very good, however in my opinion only the dCs, the Burmester and the Meitner Emmlabs set ups were very special indeed. While I listened to the Meitner system only once for a couple of hours (unlike the rest that I got to listen to on more than one occasion and some of them often) I think the Emmlabs is the finest digital front end I have heard followed by the BUrmester and then the dCs....I have not heard the Weiss or the Zanden but I have heard that they are both quite good as well.