AC Regenerator

And then,
Worth?
The whole system was improved?
About how much per cent?
Which brand is better?

That’s what I asked
Thanks a lot to who was objective in answers.
Thanks to the others too.

I thank you all, and now specially to "hemigreg", who brings us a very important theme with several comprehensivenesses, of great relevance in which I very much believe.
But I think that my solution, at this moment, involves  cost and practicality of application.
An then I ask you : 

Where can I find good audio stores in New York City, or others cities where I can find  trustworthy used AC regenerators ???

I AM WAITING FOR YOUR HELP YET.

THANKS

hifiman,

Sorry if you think I'm angry. It's a matter of haste.  All contribuitions are wellcome. 
But somethimes the discussion goes so far from the topics that the objectivity is lost.
If you observe, this is the third time I ask about.
And I need a consistent feedback for an eventual decision, nothing more.

Thanks