When's enough, enough?

Just wondering why when we achieve a sound we like, do we keep looking for more? It seems like there are alot up things we do that makes an improvement to the sound we have, when do you stop? I'm assuming there is only so much detail, so much depth and width in the soundstage that you can get, yet we can still find a power cord or i.c. that changes the sound in positive way.
"Hello everyone, my name is Bruce, and I'm addicted to hi-fi."