Best Digital Cable for Karik Numerik?

The digital link is a 75 ohm BNC cable. I use the Tara Labs RSC Master 75 ohm BNC cable. I have tried various cables on the clock link and have found that only the stock Linn cable provides the correct sound. I use Nordost Blue Heaven on the analog outs which relates to a smooth spacious presentation. Other cables on the clock link not only seem to screw up the tonal balance but also the pace of the music. The replacement of the 75 ohm cable results in deeper bass and an airer top-end. The stock cable is pretty good throught the mid-range.