I don't justify it. If I have to justify it, that means I shouldn't be getting it. I PLAN all of my large expenditures, I save for it, and utilize patience until I get what I want at the price I want it.
Once I get it, I plan no more big purchases until I have put the money just spent back into the bank.
I waited over a year to get my Sunfire TGP III on Audiogon. That patience paid off big time. I was willing to spend 1500.00 for one. I got mine for 1100.00!
The other reason why I can spend what I do, is because instead of buying a cheap POS, I buy something that is made to last for years & will keep it for years.
My main speakers are going to be 20 years old in Feb. I am only just now possibly considering upgrading them simply due to age. I will keep my Sunfires until they die, the same with all of the rest of the gear in my signature.
I don't need the latest & greatest thing that comes out, nor do I want it. That to me would be a waste of money.