Best digital cable to audition?

I auditioned the Marigo Labs Apparition 5.6 vs the Transparent and, in my system, I liked the Transparent better.

I also recently auditioned the Synergistic Designers' Reference and Absolute Reference digital cables. I felt that both were better than the Marigo 5.6 on my system. They both provided a better soundstage and more air. The Absolute Reference was quite a bit better than the Designers' Reference. It it one of the best digital cables I have heard, but at a price tag of $2,000 it better be.

I upgraded to the Synergistic Research Absolute Reference digital cable. It is a drastic improvement over the Marigo 5.6. The soundstage, bass, and aire are much improved. I am very impressed by the Synergistic line and am switching to all of their cables. The more of their cables I run in my system the closer it gets to where I want it. I have yet to hear the Stealth, but it's a little out of my price range to be honest. I am just a poor grad student at this point.

Has anyone heard the Kubala-Sosna or Pranawire digital cables? If so, how did they compare to others you've heard?