Electricity and power plugs around the world

Browsing through offers from all over the world on A'gon, I have often wondered about voltage, plugs and receptacle standards. I found this website that may be of interest to some:
They have better shaver sockets in the UK than we have as our main sockets in our houses.
Is there any point in spending 1000's on exotic power cables when the connection to the wall is piss poor and totally inadequate?
When in the UK my music room had its own dedicated 240v power supply from the mains, just for the hi-fi, and nothing else in the room, my hi-fi never sounded so good.
Good point Gawdbless! I did just the same as you did with excellent results.