I've listed electrostatic speakers in a store some years ago. I found their sound very warm and pleasing; however, they also have an incredibly narrow sweet spot. Outside of it, the sound quality was just okay.
Maybe a new design addresses this somewhat. YMMV
TBH: You already have great speakers. To step it to a whole new level up and have zero second thoughts about the upgrade, my 2c is to save up a bit more and get these speakers:
https://philharmonicaudio.com/