Speaker recommendations 10 to 30k and no beryllium

I would look at Kaiser, Wilson Benesch, and Raidho.  The best of their speakers under $30K are stand mounts but all are amazing products.  You could also look at Vivid.  

The Chiara is the best sounding stand-mount I have ever heard.  I love the Raidho tweeter (used to own the X-1s) and Wilson Benesch and Vivid have technically advanced cabinets and unique drivers.  

The only thing I would say about Raidho is you need to give them space to breathe and that tweeter is very delicate. It won’t make your kids sick but it can be ruined easily by them and Raidho does not offer grills.
That being said, most amazing soundstage I have ever heard when they are set up perfectly. $18K for D3 v2 is a fine price. You may want to reach out to Raidho and see if an upgrade is available and how much it would be.

otherwise, Blades! Vivid Giyas! Joseph Audio Perspectives! This is choice!