Speaker choice

These Joseph Audio speakers will do everything you’re looking for including throwing off an expansive 3D soundstage and disappear as a sound source, and you wouldn’t need a sub unless you want one as they go down to about 25Hz.  The dealer allows for 30-day returns, and at $2799 they come in well under your $5k budget.  Best of luck.

https://tmraudio.com/fresh-arrivals/joseph-audio-rm33si-limited-edition-floorstanding-speakers-pair/

Here’s a review that nicely captures its sound characteristics…

https://www.stereophile.com/floorloudspeakers/476/index.html

There's about a million speakers out there that would beautifully meet your needs in today new and used market.  You'll just have to figure this one out for yourself.  Happy listening  

There is a Volti Audio Razz in blue on the US Audiomart which is a good deal. I auditioned the Razz a few days ago and pretty much sold but I am going to get the higher model Lucera or Rival…when I make up my mind when I can fly to  Volti audio for a more extensive audition.

There is a used pair of the Razz on the Volti audio web site..

Ascend's ELX towers.

hmmmm....can you get the best out of your amp with $5k speakers?  Maybe defer a little longer until the budget increases?  Usually the best upgrades are a leap rather than a step forward though this can be frustrating.    

...best advice, always.... ;)

Happy hunting, J 👍😎