in all seriousness, in all these years in this hobby i have never ever considered randomly replacing/upgrading a driver on what i believed to be an expensive, well designed, good sounding set of loudspeakers...
to me, what we are paying for, above all else, in a really good speaker, is the maker’s exacting, knowledgeable integration and fine tuning of the various piece parts that in their entirety comprise the loudspeaker that was produced for us to enjoy