Starting flame wars is one of the fundamental goals of probably 25% of the people who actively participate on the Sound Science Forum. (At least another 25% have a deep seated need to demonstrate their brilliance.) It's ok. Some people have a tough time at work, or a tough time at home, some people have "issues," etc., so it's sort of therapy for them to come on the Sound Science forum and act out. You just have to let them do their thing. Eventually, they get bored, or maybe they feel better, and then they go away.
This is the sound science forum. Let's stick to SCIENCE. Once again,
The sound quality must be best at the LINE OUT on the amplifier. It doesn't make any sense that the sound would IMPROVE as it travels down a wire. And if you don't agree, ask yourself what would sound better: a 1 kilometer length or a 1 meter length of the same cable.
This begs the question, what length of cheapo Radio Shack interconnect is comparable in sound quality to what length of XYZ super-expensive interconnect. Certainly 1 meter of Radio Shack interconnect will sound better than 1 kilometer of XYZ expensive stuff.