Soundstage and explosive dynamics?

JBL Synthesis horn speakers with large woofers will give you a wide stage and fast bass. With that being said the listening room plays an important role. Demo what you can before making any big decisions. 

Maybe build the system from the bottom up, with multiple really powerful subwoofers (plus room equalization).

Try to find a pair of used pro studio main monitors. These are the big speakers that are often mounted in walls - Westlake, ATC, Genelec. Meyer etc.

Don't take my word for it....  Read the review in Stereophile. 
https://www.stereophile.com/content/focal-aria-936-loudspeaker
I think it's a balanced and accurate description of the speakers which I strongly agree with which seems to fit the bill of demands you've got. The larger 948's are even more of this. 

What you are looking for may be a larger speaker rather than smaller.  

I am loving the dynamic shading I get from the Klipsch Cornwall speakers.  Very hard to beat for the money.