I have a Japanese audiophile friend. He built his own speakers (from specially-chosen woods...), is constantly upgrading and tweaking his set-up in the weirdest of ways. He obsesses about things like the quality of his house's electric current, and installed a voltage regulator to ensure a supply of "clean" electricity. The distressing thing was, both my wife and I agreed that his set-up didn't even sound that good

It sounded better than my (totally average) gear but not thousands of dollars better. Audiophilia is something of a disease. Luckily, I have a mortgage to stop me from getting too deeply into it!