Hey Batman,
Yes I have heard them. The Hyperion sound is definately there - open, transparent, detailed, and excellent imaging - but the bass, dynamics, refinement in the treble are not at the level of the 938s. The treble may get a little "hot" if you use cheap solid state electronics. But for about $600, I haven't heard any dymamic speakers sound as good - I've heard sub $1000 speakers from Triangle, Castle, Oddyssey Epiphony, Epos, B&W, etc. Perhaps the only speaker that rivals it is not a dynamic speaker, but the Magnepan SMG, but the Maggies are more rolled off in the highs and has slightly less dynamics in the bass.