Speakers for leading edge, transients, speed and big sound
My first thought was a line array and/or dipole speaker like the Nola Baby Grand, Genesis Forte, etc., but they are mostly out of your price range even used. But I found this Pure Audio Project speaker that may well do everything you’re looking for yet starts at under $13k new, and there are a couple available used on USAM. Just another option to ponder, and best of luck.
https://pureaudioproject.com/quintet15-wall-of-sound-open-baffle-speakers-for-large-rooms/