In my experience, there's a very loose relationship between SQ and $ spent. Recently listened to the system of a member of the local audio club.
Poor guy spent probably $500k on his system and I have hugely better SQ in my sub-$50k system. I would never trade with him.
Room setup and treatment and paying attention to the little details - the weakest link in the chain, synergy among components - can make very modest systems sound glorious.
You know you're there when when the music is so emotionally involving you have to force yourself to stop listening.