Instead of asking this question, which has been asked a hundred times here, and if you want to truly answer the question you will need to listen for yourself so here is my suggestion:
Contact an on-line merchant who will allow you to return cables after a 60 day in-home trial. It will cost you about $75 to return the cables. I used Music Direct. When Shunyata Venom-X cables first came out I read some info that peaked my curiosity. So I bought $6,000 worth of interconnects and speaker cables and installed them into my system. The audible difference between the lower priced cables I was using and the Shunyatas was literally like a major component upgrade. Needless to say I kept the cables.
If you don't want to spend that much then go the used route. I helped a friend put together a set of Acoustic Zen for his system that cost about $2,200 for all cables. He was quite surprised and happy with the results. If you are not impressed then sell them and go back to your current set up. Some people can hear the difference, others cannot. If your hearing is not sensitive enough you may not benefit from the cable upgrade.
Prior to this both of us were skeptics. Now we are believers.
With this said, perhaps some room treatment would be more of a benefit for your pursuit of audio nirvana.