I quite like some (not all) of Steve Guttenberg’s ruminations, and I remember him saying that you know when you’ve got a good system when you keep listening to it. That “one more record” feeling. Until you realise it’s 2:30am.
Perfect? No. That’s doesn’t exist. If it did, we’d all have it.
I think that perfectly defines as close to 'perfect' as we could ever get. The music is the whole purpose of our hi-fi endeavours after all.