Closing your eyes during placement of your speakers is probably a good idea for your sound stage and imaging.
A properly designed flat response power supply would be hard to distinguish from another that is of the same quality or build, regardless of price or colour.
I myself played the Oboe, Clarinet, flute, Tuba and baritone. My parents played guitar Gibson, Fender, acoustic's etc. and the average guitar amp. Peavey, fender etc. is only 30watts. So a well crafted Amp. will out power those easily and you probably would notice a difference.
Though regardless of any of this thread, glad to hear that you have found your preferred product. If the tubes glow in the dark and look good even better. Your guests will enjoy it to.
Congrats
