A regular dac will not work with SACD or DVD audio discs. You have to use your analog outs.
Bel canto DAC 2
I just got a Bel Canto DAC 2 and maybe I should've done more research on this. It looks as though you feed this a 16/44 signal and it "upsamples" this to 24/192. However, what if I'm feeding it 24/48, will it upsample that as well? Or for that matter, can I even feed this anything other than 16/44? Sure hope I can. Once I get the rest of my gear I'll be able to experiment with this. Thanks for any insight.