The only thing you'll achieve by buying a new expensive power cord is having something that might look pretty compared to a standard cable. But besides that, you won't hear a single difference. You might actually be introducing noise. That's snake oil for ya. If you're not happy with the sound of something, check your room acoustics, make sure you have a capable amp, and/or replace your speakers. That's it. Everything else is a waste of your money.
Power cord upgrade
I want to upgrade power cords for my streamer, Aurender A15 which currently has a Shunyata v14 digital.
And Puritan 156 which has the classic cord it comes with.
I believe in system synergy, so I am leaning towards Transparent, and/or Audioquest.
I have ARC ref5se with the Transparent Reference, and ref75se with the AQ Hurricane.
Guess my thought is the streamer and 156 PC are maybe a bottleneck. Won't know without trying, right? I am satisfied with the over all sound now, so looking for more of it. Make any sense??