I know there are many audiophiles who can afford many a speaker, and some choose Harbeth’s, I don’t think they are your weakest link. I have never owned Harbeth’s but I believe they have no problem imaging with complementary components.
Try some better amplification first- demo an Accuphase or Boulder integrated, or go separates?
I am sure you are going to upgrade your Luxman if you get larger floorstanders anyway, so maybe start there? Upgrade your source to get more refinement and resolution and tilt the sound from laid back to more detailed- what do you have now?
Unless there is this important underlying principle of "when she is gone the first thing I do is get my huge speakers because she never let me get them before" which I understand. Then put the Magico’s on the short list- they will have the opposite qualities of the Harbeth’s, and they are anti-female black which may appeal in your situation. Those Vivid Giya’s recommended earlier are quite anti-female also. 