Another view is to change interconnect so your system has a different sonic signature before it takes a journey to the speakers. Is that possible?
If so try Van den Hul with carbon conductors.
I already have several VDH D102 111 hybrid interconnects from my 500 kit - but these are redundant with my G95.
And why your system sounds bright and harsh?
Home-cinema listening is fantastic to listen to on the G95. No problem there whatsoever. Listening to music is another story, though.
Initially, I couldn't understand why music listening was not as epic as when watching movies. My local Meridian dealer explained that the problem lay with the interaction of the revealing/clinical Class D ('digital') amps in my G95 - together with the bright HF drivers in my Mission Elegante speakers.
His recommendation was that appropriate speaker cabling would remedy the problem. I'm merely trying to ascertain others' possible real-world experience of alternatives.
I had not previously considered a 'power conditioner' - and will need to investigate further.