All the suggestions are darn good, but don't dismiss the Kefs. The most recent Kef experience was hearing the R300s. The owner had them driven by a £300-ish Yamaha A-S 500, and they sounded cracking on that alone. When I plugged them into my Leema it took them to another couple of levels.
Clearly there's too many to home demo with the pandemic in mind, so you'll have to decide what sort of presentation will keep you listening. If you're looking for ultimate refinement the LS50s are in pole position, but if you're looking for a more organic presentation then Totem, Monitor Audio or Harbeth are a better bet.
Also if you like to listen at idling levels, generally speaking the best speakers are the ones with easier loads, impedance of 8 ohms and 86 dbs upwards tend to be better. This rules out the Totems, Harbeths and LS50s as they need a decent levels to hear them at their best. Monitor Audio and Dalis would fit that bill better.
Like you I don't change my gear on a regular basis but that proves that finding something you can live with pays dividends.
Good luck and keep us updated.
Another speaker I forgot to mention is Epos. Creek and Epos were based together and therefore should be a cracking match. Worth investigating, assuming the OP looks in again.