Harry, looking into your speaker cables and interconnects, I think you deserve an upgrade there considering the quality of your components. You will probably get a bigger bang for your buck than with upgrading power. I started with the AQ Evergreen cables just like you, but they are in no way revealing or the most dynamic in terms of frequency extension. You should try a few different brands - many of them have great return policies up to 30 or 60 days.
Personally the cables that got me to the “wow” moment were the DH Labs Air Matrix Interconnects (which I bought used) and the DH Labs Q-10 speaker cables (which I bought as bare wire, not terminated so I saved a bit of money that way). I still use plenty of DH Labs in my system, but I am now on their highest tiers of cables across the board as I have since upgraded my components, encouraging me to try even higher end cables like their Revelation series.
Personally the cables that got me to the “wow” moment were the DH Labs Air Matrix Interconnects (which I bought used) and the DH Labs Q-10 speaker cables (which I bought as bare wire, not terminated so I saved a bit of money that way). I still use plenty of DH Labs in my system, but I am now on their highest tiers of cables across the board as I have since upgraded my components, encouraging me to try even higher end cables like their Revelation series.