I have used the Bel Canto DAC-1 with the EAD UltraDisc 2000 and Micromega Premium DVD2 players. You will definitely prefer to use the Bel Canto instead of these players' internal DACs.
The Bel Canto DAC-1 responds really well to a better power cord. $100 into a used Harmonic Tech Pro-AC11 cord is a must-have as the improvements are dramatic. Both myself and a friend who also has the DAC-1 agree with the power cord inmprovements.
Granite Audio 470 interconnects ( expensive ) are also a stellar performer with the DAC-1. We have compared them A-B with H.T. Pro-Silway-II and Coincident CST.
Used DAC-1's go for as low as $600 here at Audiogon.