Recommendations for 20 amp electrical outlets

What is an IG outlet? The safety equipment ground contact on the outlet is insulated, isolated, from the metal supporting back strap and the center 6/32 threaded metal hub of the outlet used to hold on the outlet wall cover plate.

@jea48 Oops. Sorry again. I just reread your post for the 4th or 5th time and I went and looked at a duplex outlet I had bought a while back ago at Lowes (Eaton) and the equipment ground (third "hole"/uninsulated wire) IS in fact connected to the backstrap. So this Eaton that I bought a while back ago at Lowes is NOT an IG, correct?

I'm currently using Audio Envy's OKTA PRO Gold receptical.  In addition my Naim dealer, AV Options carries a deep cryo Hubble that performs well and both outlets bested  the PS Audio and Pangea in my system.  Good luck with your upgrade. 

N

@nutty Thank you!

@immatthewj Here is a very comprehensive article on IG receptacles. Fig 6 shows the basics at a glance.

https://iaeimagazine.org/2006/march2006/isolated-grounding-receptacle-circuits-got-clean-grounds-or-dirty-grounds/

Not very onerous to implement if installing a new circuit, but what are the benefits in terms of noise suppression over a 12/2 Romex homerun? This is a straight question, I don't actually know the answer.

Thank you, @devinplombier .  I truly don't have a good understanding of the subject of home electrical and the isolated ground nomencalure confused me (which is not hard to do).  Amm my circuits, including the dedicated circuits I installed for my system, are NOT isolated ground circuits, and obviously none of my duplex  receptacles are IG receptacles.  I was confusing IG with the uninsulated equipment ground.  Just something else to put in the "what I learned today" column.  Thanks again for helping me out with that.