People have to remember that the BBC designed speakers are a engineering tour de forces of a concept where no budget was ever an constraint.
I think most people bad mouthing the BBC design, have never heard un amplified instruments being played.
I have the LS5/9 and I get goosebumps hearing a violin or cello playing, just so natural and sweet sounding, Jazz is sublime to listen to also.
If one need more omph, get a Rel sub or a pair if you can swing it.