SPDIF Coax cable recommendation?

I used a generic Amazon cable and then upgraded to DH Labs and lastly Shunyata Sigma.  Each step was a marked improvement.  DH labs was the best value.  They have a money back trial period.

I would advise to get the best you can under your perceived budget. $200(?)

First thoughts for under $200 would be something from Silnote, Audio Envy, Moon Audio, Zavfino, Morrow Audio.

Second thought if you wanted [much] cheaper (in agreement with AGD above) are the Blue Jeans cable, Supra, or maybe Mogami. If you could wait a few weeks for delivery (and didn’t have any other ’concerns’) - would be to try Chinese Nordost Valhalla or Odin knock-offs.

Good cable choices generally won’t usually turn a decent $5K system into a great $50K one, but lousy/wrong cables can turn a decent system into one that is just average - or worse, almost unlistenable. (Although admittedly a digital/SPDIF cable less so).

Acoustic Zen MC2 is great. DH Labs would be my second choice.

My default for relatively inexpensive cables is always DHLabs. I find them very cost effective… and reliably good sounding, unless your system is too bright.

Assuming BNC connectors the Belden 4794R 12G CDI has seen off quite a few digital audio cables when I still used SPDiff. Blue Jeans sell it for not very much but it’s quite stiff and be carful about the bend radius. Works well with a BNC to RCA adaptor at one end too but not both.