complementary power conditioners

Interesting Hhiggins.
I imagine the separate Equitech transformers would provide a very high degree of isolation within their effective frequency range. I doubt the Monster products extend this range and I believe that they may well reduce dynamics-particularly with your amplifier? Have you had or could you arrange to try an MIT Z Stabilizer in your system?
Perhaps you could describe your system layout a bit.

Avguygeorge, I'm sure some conditioners would not be complementary but combining ones where one offers a reduction in common mode noise rejection and another works on differential noise rejection may be a different story.
I have found experimentation essential and productive.