A good question just came to me. I was wondering if anyone knows how much better a optical cable is better than a coax cable for digital audio. I'm a computer engineer, so I was forced to study digital signals, and I'm still a bit confused. The whole purpose of a digital signal is that it is either high, or low. So, if the signal picks up some noise, it doesn't affect the signal in such a way that the decoder cannot tell if it is a high or low signal. I would think an optical cable would be better because you have no impedence issues, and a faster data rate (although this is dependent on your system, I don't think receivers send the info faster on fiber than coax.) Either way your sending a bunch of 1's and 0's across a wire. Does anyone have any thoughts on this, or read some technical papers on the subject? I'd be interested in hearing your thoughts.