I would read reviews here. I know the MSB DAC allows for different modules (upsampling, HDCD, power suppies etc) to be plugged in. This will allow the user to get the features that he wants to pay for.
I was about to mention MSB too. Although with modern DAC's in most cd's and dvd players being so good (compared to a few years ago) I would wonder why anyone would really need an outboard device.
I think MSB will even do a mod for you if you send them your player--I would e-mail them and tell them what it is you really want to accomplish.
IMHO parasound made a DAC and if you are lucky enough you can find it still dac1100hd the best i have ever heard no matter what the price . works well with just about any transport i have used with a california audio dx-2 cannnot believe the sound that you get out of this Rig. thanks for the time