What speakers for $5K Used?

Legacy Audio Focus loudspeakers or (if you are lucky to find) the newer Focus 20/20 model.

I have a pair of Aerial 10T's in the S/R finish with a pair of BAT VK1000's on the bottom and a pair of BAT VK60's on top. It's a nice combo.

Revel F30 if a nearfield setup. Piegas or Nautilus 803 if farfield. Thiel 2.3 or even 1.6 if you don't need the dynamics.

A speaker I like in that price range is the Proac 3.8. No, I don't own a pair. Great balance from highs to bass. Grainless mid range. Easy load for your power amp to drive. The speaker is forgiving of those recordings that are not audiophile quality. Last, wife acceptance factor very good. They are not large.

If you can find a pair---Verity Audio Fidelio! Midrange like you have never heard before, great detail. A very lifelike speaker with no fatigue at all, smooth. Very easy to drive and they look oh so good, very small footprint. Rear firing woofer make them somewhat room dependent, but I have found them to be very, very good speakers--my search has ended! I have seen them for sale every once and awhile for around $5000.00 give or take. Take your time, good luck.