All are great. All but the HK put out similar power. The HK is simply a powerhouse of insane current. The Yamaha could be had at the lowest price, followed by the Denon. The Marantz is overpriced right now, and needs some time on the market to come down. The HK is the best of the four, but you'll pay almost double for it. Thus the HK isn't really in the same ballpark as the other three. Yamaha is coming out with some new models this fall with XM Satellite and possibly HDMI/DVI hookups. The Marantz already has those, but again, is overpriced right now. If you choose speakers that have relatively sane spl levels (I say this all the time), you can even go with a model down from the three above without any loss in sound quality. Some don't like the Denon's remote. Take it from me, I've learned to use it, and it's got one of the best on screen displays and is a joy to use. It scares people off at first glance because it's so different, but Denon wouldn't use it with the new $6000 AVR5805 if it wasn't quick learning.