I have heard Zanden 2000P, Esoteric X-01SE, Metronome Kalista and Kalista Reference. Also Krell 505, ARC CD8 and Wadia's REference from 2010. Not all in same system but all in 1 of 2 rooms, with equipment with which i was familiar. In general, with the amount of A/B'ing done which helped a lot...i would say the 3 servers i heard (QSonix, Uvem (former Chord music server designer) and of course Wadia i70) did not compare well to any of the above transports in a direct A/B. Not one...to my ears nor that of 5 seasoned audiophiles.
My favorite transport of the above are the Kalista Reference, X-01SE and 2000P.
My favorite transport of the above are the Kalista Reference, X-01SE and 2000P.