My mains are still "harsh" and I hope Audyssey or Trinnov would help in this regards. I've tested Dave Mathews in Dolby True HD so far and the strumming of the guitar and his voice sounds quite "piercing" while Chris Boti's 5.1 LPCM trumpet's and AIX Recordings' Sampler 2 DVD-A/DVD-Video sounds amazing. This harshness is more related to the acoustics of the room and or the speakers themselves. The amp/pre-amp has very little effect on this