Before changing to the cables you mention, consider this, the quality of equipment used in professional music & film production studios makes even Hi End Hi-Fi sound pretty mundane, and they do not use any of these fancy cables which are supposed to improve Hi-Fi nirvana, so save yourself some money and go to a professional music store for your cables, that way you can sit back knowing you have the best available to enjoy your system. (Plus with the money you will have saved you can further upgrade your hardware)
If on the other hand you believe the cables you mention can improve your system, do a blind A-B test with pro cables making sure levels are matched after the change to see if you can hear any difference.
Alternatively you can just buy blind and hope for the best.
Most importantly, whatever you decide, make sure you sit back and enjoy the music rather than trying to find something wrong with it.