Power cord choice?


Hoping to change (or upgrade) my current PC in use with my ARC CD3 Mk2. Currently I'm using a Locus Designs Polestar and setting a limit $600 max. I'd like to find a cord that can get more micro details from the ARC yet, I'd like to retain the smoothness but, try to open the sound stage and get a little more bottom in doing so. I listen to Alt rock (Sir Sly, The Killers, Gargage), rock, blues using Classe CAP 151 integrated and Apogee Slant 6s. I know this is subjective but, I'm also doing my best to work with my budget constraints and I'm not going to change if the improvement would just be slightly incremental. I'd like suggestions to consider, please.
rsjm80
For those who are using the "water" analogy, have you had a chance to look at the size of the amp "fuses"? Tiny little thing would represent the bottleneck but it is not.  Electricity is not like water.    

If the last 3ft does not make any difference, then why would the power supply rectifier make a difference?  The rectifier is actually the last component after the power cord, the fuse, but it makes the most difference.

If you don't think power cord make a difference, then fine if you can't hear a difference.  But don't go around telling the power cord is the last 3ft.  It is neither the last or the first because electricity is not like "water".
Post removed 
Here is some more real science for you guys to try and soak in. It’s got graphs and charts and lots of explanations.

https://youtu.be/dLghg0QXPzs
LOL!!! Posting videos from Ethan Winer and AmirM on cables is like posting articles from the anti vax crowd on the benefits of .... vaccines 
With the name like "AudioScienceReview", I mean who could have argued?  It got the word "Review" hence it has to be good, right?

And as for the "Null Tester", it got me laughing out loud as how naive that is.