OP,
Wow. Sorry to hear so many useless replies. There is no end to the improvements you can make. The big question, which one first? Which is what I think you asked.
It would be tremendously helpful to see your system and venue. There is a place under your user I’d to show it and components. This would help us understand your current system. Also, any comments about what you like about your system now. You have great speakers… so, there is great improvement possible.
Most of us that are really passionate have long term interest in improving one component at a time to achieve the best possible sound. But, also to have each purchase be satisfying in itself and bring us closer to the maximum capability of what we own. With your speakers there is a lot of possibilities.