See here's the thing. You changed something in you system and you think it "sounds better" and your wife agrees.
Well, what about it was better? Did you change it back to see if the change reverted? Did you then test your perceived changes with any kind of quantitative testing equipment?
What you have recounted thus far is about as reliable as those commercials on TV for the "gambler's charm" where they have a person say they "felt much luckier" with it. And this is a typical audiophile recount.
I once knew one of these folks that paid $500 for a standard IEC power cable for their preamplifier. I reminded them that the wiring in the wall of the apartment was shit, but he insisted he could "feel" the difference, though it was not describable in any way past that.