AC outlets

Another thing to consider is if you will like any kind of plating on your outlets (or cord ends for that matter). My preference is for the Maestro which has no plating. To my ear it is more natural sounding than any type of plated outlet that I have tried.

Also, cryo treatment has it's own effect that may or may not be to your liking. Since, I am hyper sensitive to the higher frequencies and any high frequency anomalies, cryo is too hard and harsh in the upper mids and highs to my ear, but that most likely applies to only a small group of us.

I preferred the musical sound of the ACME ac outlet over the Mastro outlet. Sounded more natural and in my opinion holds up better regarding plugging in and out repeatedly.
With that said I have many Furutech GTX-D NCR(R) that I like best.

@oldhvymec, 
"Bling is good.. I like bling on a good lookin girl.. JUST BLING."
Obviously a Randy Newman fan, "You Can Leave Your Hat On."

Bling is OK if you can afford it as long as you realize that is all it is.
From a performance standpoint any 20 amp outlet will do just fine. If you can not afford "bling" at least spend your money on something that might actually make an improvement although lately it is getting harder to tell what that actually is. If you don't want everyone to see how crude your excellent system is just hide everything. Ignorance is bliss.

New Quantum Science Audio Black/Red AC Outlets ?

I use 4 Hubbell locking receptacles in my audio rig. See link below.

Mike