@OP. You shouldn't be having imaging issues with your Harbeths. So the issue there is either setup/room and or ancillary equipment. The Harbeth's are tonally refined, which some people would characterise as laid back. But driven by a more dynamic amp, you might be surprised at them - especially given the kind of music you say you favour. Putting a speaker in the upper percentiles of your price range on the end of your existing amp is totally cart before the horse. So I would recommend that you review your entire setup before going changing speakers.
Getting a Divorce and can now buy floor standing speakers
So, I am getting rid of the wife (divorce, I am not burying her in the backyard!) and can now get big floor standing speakers. I currently have a Luxman integrated and model 30 Harbeth speakers, and a very good sub. Very neutral/natural sound, can listen for long sessions. But I don't get a very good image, and it seems a little too laid back. I listen mainly to singer-song writers, both male and female. Lots of acoustic/piano.
There are so many floor standers now, I'd like to shorten the list. Any suggestions to start my search? I am located in southern CA, so I can listen to almost any brand. Price should be under $100K.
I may lose a wife, but so far the freedom/cash is worth it.
Thanks all!