dimitris7,
Congrats on acquiring a pair of MS5's. I have the gorgeous Alpi finish & they sound just as gorgeous as they look, with a lush soundstage & dynamics to die for! My system is showcased @ US Audiomart if interested:
http://www.usaudiomart.com/view_userimages.php?user_id=45433Your system is admittedly probably several orders of magnitude higher than mine, so you will probably feel goosebumps when you finally get the synergy.
My most recent purchase was Apple TV 4K & I must say it sounds rather astonishing compared to my previous generation Apple TV feeding into my Oppo BDP105. My source for that feed is my MacBook Pro running iTunes. I am running a DD turntable feeding a tube phono preamp for my vinyl rig with very satisfying results - again due in large part to the synergy that of course takes a while to figure out.
As others have confirmed, synergy is the key; I have found running tri-wire speaker cable made quite the difference even though I am only powering the MS5's with a Hybrid Integrated with only one set of speaker outputs. The secret was, for lack of better description, the geometry of the wiring from amp to speaker. I experimented extensively for sometime & found the perfect geometry; I was taken aback quite literally when finding the perfect synergy. Have been quite satisfied for nearly a year now not having made much change other than relocating to another state.
I took the "Diagonal Bi-Wire" idea (from I think it was either Nordost or Audioquest) to the next level but in a Tri-Wire configuration instead. Do some research on it & since you are an electrician, I think you will in all likelihood figure it out. It didn't seem like it was going to make much difference, but in my case it made a world of difference, particularly in the bass definition.
Keep us posted!