What sets the Anthem apart from the others(Marantz, Integra, Onkyo.Denon)? Is it the room calibration ? I am looking for the preamp that is dead silent when it comes to noise. I find that the sonic realism depends not so much on how loud or localized sound is, but rather the dynamic audible range.Is there a guide/review somewhere that compares these simply in human terms? There is so much 'market speak' on the net, I cannot really figure out what is being said.