I need some suggestions on a receiver in the 450 to 500 price range. I currently have a kenwood vr-507 receiver and ever since getting my wharfedal diamond 8.1's I have noticed that they do not sound very good with this receiver. The sound is very harsh. The kenwood is rated at 100 X 5. I am not sure if it is because these speakers are 6 ohm speakers and they only have 86 db efficiency for the mains and 88 for the center. I am looking at possibly one of the HK receivers but the only thing that concerns me is there power output. I am looking for a warm sounding receiver.