i thinnk there is a strong relationship between this thread and the one titled "music vs components".
as for enjoying the music with regard to how it affects you, a table radio is sufficient.
i think you can hear the music in tour head without any equipment and still enjoy the feeling that you are creating an image in your brain of music that you enjoy for its own sake, regardless of how it may sound on a well assembled stereo system.
i believe in the dichotomy between music and sound. a good stereo system can recreate the timbre of an instrument, while a mediocre one may still enable one to enjoy the music.
i can recognize, what i consider "good" music listening to a stereo system that has an imbalanced frequency response, while acknowledging that sonically the stereo system may be deficient in certain respects and my enjoyment of the sound might be impacted.