Step 1-Try some different cables in YOUR system. The Cable Company has a lending library for at-home testing. Step 2- Buy cables you think enhance your listening pleasure.
You can trade or sell said cable at later date as your tastes and/or system changes.
Step 3- (Most important) Ignore anyone on-line or off-line posters or "experts"/"engineers" who want "Blind Testing" or "Scientific Measurements" to "prove" or disapprove the spending of any $$ on cables...or any other part of YOUR system.