there is a DAC functioning, you are just using the DAC at the receiver or pre/pro if you are using a digital connection.

SInce you are using a NAD C372 integrated amp, it does not have DACs or digital connections, so you would have to use the DACs on the CD player.

The C372 is one nice integrated amp.

As for SACD's, yes, there are many that are specifically two-channel, and you would need a SACD player to take advantage of the high-resolution track.