No matter how good my system sounds or how satisfied I am with it, I always find myself dreaming of something even better.
The problem is that this "better" system is not something I have heard or even know about, but merely a vague ideal, almost an abstraction. I am not even able to identify specific areas needing improvement, but merely think "this is great, I wonder how much better ____ would sound?"
It is quite possible that the system in my mind does not exist at any price, and never will.
Realizing this helps me to appreciate my current equipment more, and also to be more realistic in my expectations about upgrades.