From what I understand, you can get better sound for the price from a DAC/AMP than a sound card. What I'm not sure is whether that is true for all price ranges.
Taking the Xonar DGX, a pretty cheap sound card, would a DAC/AMP for about $40 be significantly better than getting a Xonar DGX? What DAC/AMP would be comparable to get instead of the DGX? If I cared only for music and didn't want to use the Dolby Surround it comes with, would there be no reason to buy a sound card at all?