The Aperion Audio 6-Series speakers are a marked upgrade from earlier models and bring Aperion to the point of having a completed range of speakers for almost every need. We enjoyed this system much more than even the 5-series and appreciated the flexibility they offered. In subsequent two channel listening tests I did note that compared to my RBH Sound 61-SE/R reference speakers, there was a bit missing from the midrange in terms of clarity and control - and vocals could tend to sound slightly chesty. Of course they cost more than twice as much as the Aperions. The new 534-SS Dipole/Bipole speakers are really impressive and it's nice to see the switchable polarity to make them even more useful in a variety of situations. Aperion Audio has come a long way and doesn't seem to be showing signs of slowing (in fact, they recently introduced a line in in-wall and in-ceiling products). These speakers don't necessarily perform way beyond their price range, but even so they may be hard to beat.