PSB Synchrony One or Usher Mini Dancers?

acdvd, out of idle curiosity, why would you upgrade from the synch two to the ones? it seems like other than slightly deeper low end, the ones have essentially the same design & drivers and would sound substantially the same (both great speakers, btw). if you're craving more bass, would you be better off simply adding a sub, which will go even deeper?

For the dedicated midrange driver...

and the exceptional neutrality of the Ones...