I have to say that the Harbeths handle it ALL very well.
I agree. It is indeed an outstanding speaker.
My point that they don't go very loud and that the warm bass (which is so nice at lower levels) can be overwhelming at higher levels is in the category of "nit picking".
These speakers have the characterstic Harbeth warm "audiophile" British sound and, in particular, I think the midrange excels in this one - compared to other speakers and other Harbeths (driver integration perhaps - who knows?).