Are cables the weak link in your system?
I know two TOP engineers in the AV industry (one considered one of the BIGGEST legends of all time) who use Radio Shack stock cable when designing gear.
They don't belive in good cable and I belive them to be crazy at least on that level.
All it takes is a little time listening to hear the difference. What's right or wrong isn't THAT important. Just like if you LIKE a wine but it is "oaky" or "bricky" doesn't mean its bad. All that's important is YOU like it.
More importantly - high end cables (not even expensive ones) make better connections for your gear. Weak connections cause problems and lose performance. Its that simple.
Jerry Del Colliano