My DAC (DACmagic) has a couple of inputs and it really improved what I hear from my old Marantz CD changer (well made thing that refuses to die). I've A/Bd it with the iTunes lossless signal sent to my Squeezebox Touch and on to the DAC and it sounds identical using similar AQ coax cables (VDM5, VDM3). It's also nice to know there are inexpensive things you'll feel less guilty about improving along the way.
