I'd go with the Harman Kardon. I have the AVR-525 and love it. H/K is very accurate with their power ratings, I am willing to bet it is as powerful, if not more powerful then the Onkyo even though the Onkyo is rated higher. I had a Sony receiver listed at 100 watts per channel, moved up to the H/K AVR-525 rated at 70 watts per channel and the HK blew away the sony with ease. I also think H/K sounds better, especially for music. That price is a steal for the H/K. Crutchfield has the Onkyo listed at $299.99, and the H/K at $499.99. Janr has the Onkyo at 299.99 and the H/K for $349.99. Every place I have seen the H/K goes for more money. Draw your own conclusions from that.
