I'm trying to warn you about really cheap cables... like 6 ft. optical for $3.
I'm the last person who spend money on voodoo cable, e.g. I use a DIY 75Ohm cable with quality RCA plugs.
But I had to buy an optical glass cable because it is too tricky to DIY and I wasn't sure about my quality to build it.
I would never run down other peoples or your opinion about digital cable!
As I wrote in several posts before: Digital cable should have good connectors, a good isolation and protective shielding.
IMO it looks funny if there is someone who is spending a great amount of money on buying and selling headphones, buying opamps, spending time in opamps-rolling but doesn't try a $30 optical cable which is recommended by several head-fi members because it's too expensive.