MRI grade vs Hospital grade electric outlets

magnetism in the outlet will not affect your SQ

the only thing you need from an outlet is good contact so your amp will have adequate current flow esp. on peaks and there is no need to spend more than a few bucks on an outlet -- if that

save up for some Wilson speakers or Reveles or big Maggies, etc.

The MRI outlets will not be any better than the Hubbel outlets.  Most likely they will be made from the same type of brass material.  Hospital equipment has a much different set of requirements than audio electronics.  My suggestion would be to use your existing Hubbel outlets for now.  Maybe move up to the cryoed Porter Ports if you feel the need.  Above that, it gets very expensive with Furutech,and other brand when looking at gold/rhodium plated copper or phosphor bronze.

I'm not sure why you'd want to use 30A outlets. They would require using a plug not compatible with 15A/20A outlets without gaining any particular advantage.

Al Porter's Porter Ports are a solid and reasonable choice. - IMO
http://www.porterhouseaudio.com/Porter-ports.htm
Kenny

Cleeds:

You are correct. It was my mistake. I am using 20 amp Hubbells. You have an eagle eye.