Gents,
I understand your reluctance to avoid a "bits are bits" discussion. And I appreciate the fact that some of you claim that you can hear a difference between digital cables. I can't. Given a cable that can make a good connection to the FireWire (or Toslink, or coax digital) port there can only be a difference if something is terribly wrong with a given cable, or the cable is affecting the upstream or downstream processing.
One of my old physics professors used to say "If you can't explain it, you don't understand it. And if you don't understand it, you cannot be sure what it is that you are actually observing."
So surely one of you can explain to me or have a theory as to how a digital signal can be subject to subtle and random errors? Yes, I'm a differential digital cable non-believer. But I'm willing to be convinced if someone can make a convincing argument. That's all.