The deaf man says, I can't hear, so sound can not exist. The blind man says, I can't see, so light doesn't exist.

Not all things are understood. When I go to someones house that has a mega buck system full of ridiculously ovepriced components and cables what I usually hear is beautiful sound. When I listen to a $100 Radio Shack stereo powering $69 speakers what I usually hear is dreck.

There is a factual differnce between these two extremes. To pretend that this difference becomes absolute zero at some price point whether it's $150, $500 or $2,000 is plainly ludicrous. There exists a continium of performance, admitedly the improvements become smaller and smaller as prices rise towards absurd but the good (almost always more expensive) stuff sounds better - get over it.