I am a custom installer in the Atlanta Georgia area and I recently installed a 605 for a customer. My question is what is you average listening volume? My concern is a lack of power. While listening to a CD (2 channel) we had the volume at around 75 and it was not that loud. The 605 only goes up to 100 so I was concerned that we were using 75% of the receivers to total power on only 2 speakers. I would have thought at that volume it would have been over-powering. The receiver is going to be powering a 7.1 system of Totem Acoustic Dreamcatchers. Any thoughts?