Power cord replacement suggestions

@droleg,
You might get a more specific answer to your question if you were to list the audio equipment you use, including a power conditioner or outlet strip if you use them.

@droleg, in your system I'd start with the cdp, preamp, amp last. I've owned several Plinius amps and currently own a Pliunius SA Reference.

I also have a Mad Scientist power cord, it’s also good. Power cords like everything else is system dependent and results will vary along with personal tastes. There are several other power cords that I’m sure others will recommend.

droleg;
Here are three options of power cords that are very worthwhile to look into at three different price ranges, all inexpensive in my opinion. I own all of them and I can attest to the fact that are all very good and will compete with power cords costing between $1000 to $2000 or more.
Send me a message if I can further answer any questions for you regarding these power cords.

Cerious Technologies Graphene power cords (Red for CDP and/or Preamp, Blue or Yellow for amp): https://forum.audiogon.com/discussions/cerious-technologies-new-graphene-cables

Core Power Technologies CPT-150 or CPT-300: 
https://forum.audiogon.com/discussions/has-anyone-tried-these-stunning-new-cpt-power-cord

Silver Ghost (here on Audiogon): https://www.audiogon.com/listings/ac-cables-6-silver-ghost-custom-made-silver-rhodium-woven-power-co...

@uberwaltz,
IMO, if a component has a Panel Mount IEC Connector Plug then I would add an upgraded power cord.
In your case you have a very nice system that will improve with the addition of upgraded power cords.
You don’t have to spend a fortune for power cords, I'm recommending several to you that have huge bang for the buck and in my mind are relatively inexpensive however that most likely depends on one's pocket book.
Listed in no special order:
Cerious Technologies Graphene (Red, Blue or Yellow)
Core Power Technologies
Anticables Level 3 Reference
Silver Ghost (sold on Audiogon)
Blue or Green power cord made with Furutech wire (my current favorite and a true killer of the ones I mentioned, in my system).

@uberwaltz,
I totally understand ;-)
The power cords I recommended to you, can be purchased new for between $160-$650, most around the average cost of $300.
I know there are a lot of other power cords available, but the ones I mentioned, I have in my two audio systems. I've also owned and still have some power cords that range in price between $1000-$6500.
If I had only known then what I know now I could have saved some dollars! LOL, part of the hobby and learning cirve.

@Droleg,

Congratulations upon the updates you made to your system (ran two, 10 gauge 20 amp circuits to the system, speaker placement, isolation devices).
I'm sure you know this, but I want to reinforce that one might make one change at a time (baby steps) so you can hear and learn what each change in your system has accomplished. I would think the two, 10 gauge 20 amp dedicated circuits might have been the biggest game changer.

"One question. With everyone touting "20 amp dedicated lines", why do the aftermarket cords just have 15amp plug ends? Won't this just choke up the current and negate benefits of 20 amp circuit"?

Droleg, your 15 amp male plug, cannot choke the current coming out of your 20 amp circuit, a 20 amp male plug looks a little different regarding the configuration that plugs into the socket however there isn't anything that limits the AC draw. A 20 amp male plug is a built in safety feature so to speak, a 20 amp male plug usually has a 20 amp IEC on the other end and can only be plugged into a 20 amp AC wall outlet. Google the outlets and look at the pictures to see the difference.
I hope this helps clear up the confusion?

You should have some fun with those new power cords ;-)

Best regards...
Lak