Johnny, what is it about your current setup that displeases you? Address these things first. If you say need more bass, mids are weak and highs are crass, then join in the millions.
What do you want to correct?
Have you considered your room layout and the audio effects that it imparts?
Johnny, it can always be 'better'. If you can identify the areas that are lacking, 'more bass', 'lower bass', cleaner highs', etc., yoummight have a better idea of where you want to be.
So would we.
Maybe give an example of a commonly known piece of music and what you are looking for?