1. DeVore O Reference (simply extrapolating from what I’ve heard from the O/96)
2. MBL 101E
3. Joseph Audio Pearl graphene
4. Perhaps some flavour of horn speaker. I find myself ever more persuing a sense of density and aliveness, which horns are known for. But I have little experience with Horns aside from hearing something occasionally at an Audio show. (Though I’ve been enjoying listening to the Klipsch La Scalas at a friends place)