You already have a very nice system so I am surprised that no one has mentioned room treatments?
Before upgrading anything else, treat the reflection points in your listening space. Put some bass traps in the corners. There are some very simple DIY projects that don’t cost a lot of $$. You want to hang things that can absorb reflections.
I initially stuffed some large bean bag chairs into the corners behind my speakers to see if I could hear a difference (I could). But any large stuffed pillow could work.
As a test, you could also try hanging heavy velour curtains at reflection points to see what kind of effect (sonically) they have.
And play with speaker positioning.
Before upgrading anything else, treat the reflection points in your listening space. Put some bass traps in the corners. There are some very simple DIY projects that don’t cost a lot of $$. You want to hang things that can absorb reflections.
I initially stuffed some large bean bag chairs into the corners behind my speakers to see if I could hear a difference (I could). But any large stuffed pillow could work.
As a test, you could also try hanging heavy velour curtains at reflection points to see what kind of effect (sonically) they have.
And play with speaker positioning.