Which digital cable to use with a Benchmark DAC-1

You answered your own question........Stereovox HDXV, you can't go wrong and for the money, it's a steal!

Another amazing choice with highest quality and giveaway price is Encore Signature digital IC from Joe Mazzaglia at Auricle Audio Design.
His auction can be found under the search word "sucks" which doesn't seem very promising until you read the clever advertising copy.

Yes, my experience too is that the digital cable makes a difference as large as with the other interconnects. I use a LAT International DI-30 Signature, in a balanced version, which is recommended for use with the Benchmark in order to get the best sound. In my system LAT has outshone much more expensive cables. I would try several cables before settling on one.

HI UTOPIA,
I AGREE WITH TEAJAY & RJA. THE ACOUSTIC ZEN IS A VERY GOOD (& ENJOYABLE) DIGITAL CABLE. IT IS BETTER THAN THE STEREOVOX.
ALSO, YOU MIGHT WANT TO GO INSIDE YOUR DAC-1 AND JUMPER OUT THE DIGITAL CABLE SELECT SWITCH. IT IS AN AUDIBLE (& CHEAP) IMPROVEMENT.

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.