Anyone have the Answer?

@chorus 
Your question is very straightforward and I certainly understand why you asked it.
Unfortunately, certain users on this site feel like they own it and that they can deride people if a question is not worthy of their response. My guess is that no one will put up with their behaviour in the real world, so they troll this site trying to feed their egos. They usually know what they are talking about, but instead of helping people that know less than they do, they choose to mock them for their perceived ignorance. Luckily, there are many decent people here as well, as is illustrated by the number of actual attempts to help find an answer to your question. And, thanks for asking the question. I was wondering the same thing.

Surge protection won't stop Lightning strikes that's why you have insurance. For normal surges the best thing is have the electric company put a device beside the meter, next best is have an electrician put one in the panel box. 

A $400 scope would pretty much do everything you want.

" Any equipment with a decent regulated power supply will reject any noise."

So far, pretty much the only statement which makes sense here..... Rest is all snake oil.  Most noise & RFI is filtered out in a proper power supply.

That is what a power supply is for....... as well as also providing a low ripple DC.

The only downside of an unregulated power supply is that it will reflect the voltage variations of the mains on the DC line.

Thanks for even more good ideas to try!
The baking analogy is something that hit home.

Some clarification please:

1. If I try an excellent power cable to my Streamer or Dac or AMP-
(Which first? The DAC?) and I find I hear a very noticeable
improvement, is that telling me I should start with an AQ/Furman/PS Audio/Shunyata or ? conditioner/regenerator first
or buy better cabling/inters?

I read of those who tried conditioners  and felt the soundstage was negatively impacted. 

2. If I flip all breakers off except the two going to my system
and that produces a very noticeable improvement, does this tell me
I need a regenerator ?? Or just install a new J-box and cut off the
wife when I listen?

3. I am beginning to see which direction to go. I am no E.E. and 
the thought of comparing sine waves leaves me woozy.

Thanks for all the various approaches.

Best,

Jeff