Best Sonos ZP-80 Mod?

I am currently running a Sonos zp80 into a PS Audio dl3 and it sounds more fleshed out than my Denon 2910. I too am interested in upgrading the sound so I emailed Cullen and inquired about the mod to the dl3 and the Sonos. He told me that the mod to the dl3 would yield a more significant difference in sound quality over the Sonos mod. I am planning to do one at a time. I did also note that the Sonos mod includes replacing one power supply, a "Low noise power supply for the clock and SR", I would think replacing the clock and circuits would yield a greater sonic difference than just modding the power supply.