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

I have over 20 years in modding the weak point in most loudspeakers ,many mfg use average parts at best , I almost alway upgrade my own the same values inside 

just far bette quality , go to humble homemade hifi capacitor test , 

Jantzen foil wax paper inductors path audio resistors , or Mundorf ultra resistors .

connectors many use cheap gold over brass,WBT Copper far better conductor is preferred ,

the Xover it’s the brain 🧠 or ♥️ of your speaker just look up the above Tony Gee is the man and has helped me ,. I just felt it needed to be said . And can give you over a 10% improvement  

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