It’s not that complicated. Don’t buy complete junk that’s going to be a weak link, and don’t spend more than about 5% of your system cost on cables because you can probably get more improvements elsewhere. Then forget about it and enjoy.
Do your ears deceive you?
If you think cables, interconnects or other wiring make a difference, yes they do. This is a long article so I won't post it here but will a link describing how blind testing results in correct guessing that is no more accurate than random chance. Enjoy.