I'd get the Denon. When I gave away a Yamaha HTR 5740 I replaced it with a HK AVR 235 for $349 (you might look into it). The 50 wpc HK blew it away. In truth, the Yamaha got almost as loud, but it just sounded very strained at anywhere near high volumes. I don't understand all the science behind it, but when people say that Denon and HK can drive a 4 ohm load and many other receivers in that price range can't I think it lets you know that you are much less likely to have a power/volume/clarity issue with Denon or HK.
