... try 2-5 cable brands in your budget that offers return policy. What I hear in my system with power cables may not be true in your case. The short answer is, power cables do make a difference.
Excellent advice: Try before you buy. It's likely you'll have responses from those who insist it's actually "impossible" for a power cable to make an audible difference, and that you're "deluded" or suffering from "confirmation bias" if you think otherwise. But there's no reason to let others make decisions for you. A good dealer will be happy to work with you and help you make your own conclusions.