This is a never ending debate but I will share a true story with you. I had a friend go out and buy a high end Yamaha surround sound receiver and speakers many years ago. I forget where he bought it but it was some national brick and mortar chain like Circuit City or Best Buy. He also came home with a box of Monster cables that ran him well over 500 dollars and asked me to help him hook it all up since he's not particularly adept at such things and was overwhelmed.
So I cruised over and brought my box of various cables and connectors etc. that is basically my junk drawer of wires and wall warts all us geeks have. I got everything hooked up and when he told me what he paid for the Monster cables I kind of, well no, I actually laughed. Yikes!
I then proceeded to do a blind test. We had several people there and I was the only one behind the entertainment center so nobody could tell what I was doing. I interchanged many of the Monster cables with cheap Radio Shack counterparts and though there were ever so slight and I mean slight differences nobody could really define which was better sounding.
I then told them I put all the Monster cables back and all of a sudden half of the people heard a remarkable improvement. None more so than my friend who had purchased them. Only thing was, I had actually changed NOTHING. I learned a lot that day with regards to perception and buy all my cables (or now make my own) based on quality of build rather than the specs and data these salesmen toss at you.
While I do not doubt your experience and your ears (as mine are sadly old
) I just take a lot of what people say about cables and wiring with a grain of salt. There was absolutely no way to justify the 400% mark up on those Monster AV cables as I proved that day yet he kept them. They sure looked pretty though behind that entertainment center!