The 2 goal music and sound satisfaction are attainable at low cost but and there is a BUT, you must learn to controls mechanical, electrical and acoustical working dimensions... Is it only my opinion ?
No it is my experience... Is my audio system perfect ? Not at all... But it is enough good to make me smiling at any COSTLY upgrade.... Diminishing return law exist... Especially if you use acoustic but also psycho-acoustic control to optimize your gear/room/ears relation...
i say that to give hope... I never want to live with music in an unsatisfied sonic clothes...I only had the time to solve this problem after my retirement... i will never upgrade nor be envious again ....Think acoustic to begin with at least...