I followed advice from this forum and purchased a Synergistic Research Master Coupler X2 in 20A for my amplifier. Well I can tell you I am so glad I bought it, there is a difference with it in my system.
Oh, I purchased it used for about $500 from memory, + shipping.
I have been interested in the Mad Scientist -
Nitro NANO Power Cord
and I've been on Facebook with the manufacturer (I think the 10% discount is still current?). I have been using Mad Scientist -
Heretical Digital Cable with KLE Silver Harmony Plugs, with favorable results. However a review of his USB still placed Curious Cables USB as better. (I used to build Curious Cables, solid annealed pure silver data wires in USB), so I'm still doing my due diligence.
The Inakoustik power cords and power conditioning certainly has my attention, and I am looking into them as well.
Keep an eye out for the Master Coupler used, if you don't for whatever reason like it, it'll hold it's value well. For me, I'm going the upgrade mentioned with
Michael Stallone, and my MC X2, it's a dead set keeper!