Critical listening or a reason to keep tinkering?

Hello knowledgable ones, opinions would be appreciated. I am new to the hobby and trying to get the most out of what I have. Thanks to all the information on this forum I think I am getting close to the unobtainable perfection in my listening world. I can get chills listening to dance of the tumblers but the question is..... At what point can I, or should I, stop tinkering, spending, inventing ways to make my system sound better? The War Department is starting to question some of my purchases because she can't hear a decernable difference, when I clearly can (placebo or not!). Please help, my affliction is getting worse ($30,000 for speakers doesn't seem unreasonable now!!) I need a cure, and no, mono blocks are not the answer..... Well maybe.