I have an Onkyo Tx-Sr500 with 65 wpc. I am very pleased with the sound, up to a point. When I want to really crank it up the sound gets shrill almost to the point of me cringing. It doesn't happen neccessarily on bright recordings either. I have Energy speakers with 94 db sensitivity so they don't require alot of power and I have a separate powered sub that I send all the lower bass to. That being the case would a more powerful amp sound less shrill? I know it would probably louder but would it take away some of the shrillness? The recordings sound fine at low to mid levels. Has anybody had this problem and what did you do to solve it?