This week, I received my new PB-12 ISD from SVS and find it most enjoyable for both music and HT.
For music, may I suggest that the sub's calibration is of importance. If the sub is set to be too loud, it becomes out of balance with the other speakers and comes as distraction. On the other hand, perhaps metallic music lovers may want that.
For HT, the sub's setting may be louder and somewhat not configured as it should be, but, who's to question what is appropriate to a big time LFE fan?
My original choice was with model PB-10 ISD but after giving the room size and placement intentions to SVS, it became obvious that more power was required to fill the air in my 15' x 35' room which also has an additional 20' open space for the first 11' in length from the front. And SVS was right. The PB-12 ISD is very powerful but my Gain setting of 1/3 up is very pleasant, it gives a rich sounding bass, and, the result is omnidirectional bass with the sense that it's coming from the Front Towers plus the Center channel (at one point I powered off the sub to understand what was going on).