Which digital cable to use with a Benchmark DAC-1

HDXV is a good cable for the money, but I just don't think it is a good match for Benchmark. It is not a very smooth sounding cable and DAC1 is not a smooth sounding dac. I would recommend Virtual Dynamics NiteII. You can try different cables from Cable Company and AZ MC=2 is certainly one that should be added to your list. Since you are talking about HDXV, I suppose your budget is under the cost of NiteII. But once you hear this cable, I doubt you'll want to use anything else. In a long run, I think NiteII is worth every penny. I evaluated NiteII with the Bel Canto DAC2 in my system and it beat AZ Silver Bytes, Stereovox HDXV, WireWorld SuperNova 5+. I never thought there could be that much of an improvement caused just by swapping a digital cable, but that was exactly the case.

Pjl2122, balanced model of Stereovox is a different cable. It costs around $350 if I'm not mistaking. The RCA version of Stereovox, the HDXV, is about $100. They are 2 different cables, cost and construction wise.