There is not much of a class difference going from what you have to a Harbeth.
if you want to get more extension look for a suitable floor stander and one with more advanced driver technology.
It will come down to budget and room size and matching gear.
We just had a client trade in a pair of Sonus Faber Cremonas to the new Paradigm Persona 3F as he also wanted greater clarity, and he is very happy.
Dave and Troy
Audio Doctor