If you think of changing speakers… I would start there. They are the first determinate of the overall sound of your system and will determine the kind and quantity of the rest of your system. It is usually best to think first as your system as a system, not a collection of
If you want beautiful, emotional, beautiful midrange with great imaging. I would audition an Audio Research I/50. It will power your speakers. I remember the first time I heard it… I just fell in love. I recently compared to Pass and Luxman… and I have a PrimaLuna integrated… I’m pretty sure it is the sound you are looking for. Even if it is not within your budget I recommend listening to one. It will give you a good reference point.
Of course there is PrimaLuna… but not nearly as engaging.