Replacing generic RECEPTACLES


How important is it to replace your generic receptacles with audio grade receptacles . I already replaced my stock power cords to high end Shunyatas. Would it still be necessary to still change my generic receptacles to audio grade? 
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audiosens........Also i just forgot , 2 of the Furutech GTX-d r  will be going into a 2 gang wall box, and will need a 2 gang wall plate. I will not be able to use the covers and the frames for those 2.  Looked  to see if Furutech has the 2 gang wall plate... They do not have it. 
In my research the most important element seems to be a layer of carbon fiber on the cover to protect against RFI and vibration.
Some forums recommend using a non-magnetic stainless steel cover. Available for quad receptacles.

These were highly recommended for duplex outlets...

Furutech 104-D Carbon Fiber Hi-Performance Duplex Outlet Cover Plate

Oyaide Electric High-grade Outlet Wpc-z


You can always purchase the Furutech outlets now and install them and then down the road get whichever wall plate you chose.
The bigger question is which Furutech outlet best suits your needs?
The Rhodiun, Gold or NCF(R)?
Are there any Carbon Fiber Quad Covers? Ive been looking on line but cant find any....
I like a brass cover. Brass is just as good as the Carbon Fiber and wayyyyy cheaper.   Also taping the plug-end edge of the blades with Teflon plumbers tape. The tape gets pushed up against the space between the outlet and the plug in use, sealing it.