The percentage argument is a common one, but ignores an important issue. A $100 cable is 10 times the price of a $10 one, the dollar amount of that difference being $90. A $1,000 cable is also 10 times the price of a $100 one, but the dollar amount of THAT difference is $900. The $90 and $900 dollar amount of difference bear the same percentage relationship to each other as do the prices of the two groups of cables, but my opinion is the $810 difference makes the cases quite different.
I have no idea how much a system would need to cost to make a single $24,000 cable proportionately justifiable. And that assumes the cable's price is proportionate to it's sound quality, a mighty big assumption.
