More on all of this here from a recent Agon discussion. Like you I find better PSU’s made an audible difference. I also use an EtherRegen with signal in from optical from an enterprise switch plugged into a power conditioner.
Just as cabeling is a component so should clean power and the Ethernet chain be. Like you @jl1ny after chasing all of it down there was an audible difference not subject to my bias but noted by my spouse who could care less.
Go Sox!