As far as surge protection, I think ZeroSurge is probably the best. It may be that that is the technology used in the Torus products. My understanding is that both SurgeX and BrickWall have licensed the technology from ZeroSurge. I use a pair of SurgeX devices with my Bryston 7B SST, BP26, CD player, DVD player, TV, subwoofer, etc.
The SurgeX devices claim load-tolerant filtering.