Rhodium plated audio grade wall socket

The entire electric panel shares noise with every single outlet in your home.  Dedicated outlets are helpful but noise is still a problem regardless. Maybe a sub panel is a better choice for your audio system.

A great power conditioner goes a lot further and maybe generating your own electricity.

Get higher gauge electric wire from the panel to ensure you can meet all your delicate frequency needs and then I think you're OK.  Wait a while and let things calm down and then invest in new outlets if you want.  these are easy to change later on

It's not rocket science.

Copper and Gold good.  End transmission.

In the end I went for the Gold plated socket.  https://www.mcru.co.uk/product/silver-plated-audio-grade-wall-socket-2/?v=79cba1185463

I will be running 2 dedicated lines with 2 spurs, one for analogue, one for digital using lorad Supra Cable  http://www.supracables.co.uk/mainscables/lorad.html 

Whilst the house is ripped open during the renovation, I thought I might as well do this now. It then gives me the opportunity to upgrade over time with things like power conditioning, the electronics and speakers themselves etc...

Once the house is done, next stage is room treatment and I'll go from there.

Thanks everyone for your advice.

Rhodium is very hard. Scratches are a real problem with any connector. Just grab a magnifying glass and see yourself!