If someone buys expensive speaker wire and hears an improvement in the sound (even though it may just be in their head) isn't it still worth it? Wether the improvement is real or imagined, the listener still gains something from it.

I have the terminated Axiom speaker cables, and although I don't claim to hear an improvement in the sound, I just like knowing that the signal is going through a high quality cable. Plus, they are really thick and heavy-duty and look nice (also harder to work with though.. but great once you get them in place).