It's been a month since the install of the EquiTech wall unit. I came across a 5WQ for a good price and curiosity got the best of me. And I'm glad. Now my Balanced Power technologies 3.5 Sig Plus has balanced power feeding it into the front end, amps on the wall unit only. So if my info is correct and the wall unit is fed 240 balanced, the system must be seeing balanced throughout. Must be plenty of headroom because dynamics have improved. Having listened to the same setup for 4 years it can safely be said that I didn't have to bring conformation bias into the picture.
Sure, one can improve a system in multiple ways but not sure that this type of improvement can be achieved otherwise. Always felt my system lacked a certain depth and wholeness. Now, very satisfying.
Plugged back into the original house wiring, let's us just say I wouldn't invite my friends over. It's occurring to me that I may be a bit spoiled.