$10-15k speaker - Revel Salon2 / Usher BE-20

I would also recommend the Joseph Audio perspectives. I love them. No listener fatigue, deep bass, and spooky imaging.

Jeff

The BE series do not use full Beryllium driver because the sound was bad on some frequencies. They chose to use Beryllium with other metals in order to create the best driver.
The DMD driver is no longer a Beryllium driver.
I don't understand why people still focus on the percentage of Beryllium inside the driver???
Do you listen to a material or to a speaker?
The USHER BE-10 is the best sounding speaker i ever heard for that price and above. The bass is incredibly detailed and deep, medium is full and emotional, highs are smooth but sharp. The all sound is deep, wide and natural. I'm really convinced that naturalness is the graal in High-end!

I think that Blumenhofer speaker would be ideal for you. However you would not need a Pass X600.5 would be the best match. A XA amp would be my choice. Even Passlabs agree with me.

Taken from their website.

Why Class A?
Because it sounds better - pure and simple.

Also does anyone really need 600watt mono amps?

For what you want, the used pair of Wilson Sashas currently for sale are ideal. Deep bass, good power handling, ability to play loud.

You haven't told us about your room. Dimensions and materials can make a huge difference - for example, a large "detailed" speaker with a slightly hot treble might sound great in a well-damped man cave, but could be a lousy choice in a small room with a lot of glass.