Wanna take it to the next level? Buy MORE speakers!

No, you have a fever, and the only prescription is MORE COW BELL!

I saw Korean made speakers  Orchestral  4 speakers hanging and one sub. Total speakers 8 and 2 sub . I like the sound. But you need space.They are at axpona this couple of years now.

Peter Walker of Quad fame preferred stacks and arrays of his original Quads. He also like to put two Quads at right angles to each other - and I like that solution the best. I use it for two pairs of modern ones.

@audioman58  is also correct. Some of the parts in factory Quads are just plain poor. Improving them considerably improves the sound. IMO.

Just get a wall of Braun L46 Speakers