I am looking to purchase a new receiver. I am more concerned about sound quality than about overall power. Right now, I have the Onkyo 500 speaker set. Thus, I will have to add another rear speaker to take advantage of the Onkyo 600. I have tried both of these receivers out at CC. The sales person there was pushing the H/K. I also have read several reviews on each system, all of which have been pretty good. I am looking for some input to help me make the decision. Of course, pricing is a factor to consider. However, looking at various retailers, there seems to be only a $50 difference between the two sets.