I just purchased the next step up Marantz, SR8001, I was also looking at Denon. What won me over was side by side, the Marantz AV receivers just plain sounded better. Something you will find is that the Denon have many more bells and whistles, but what was spent in those bells and whistles in Denon the engineers at Marantz put into the audio quality of the Marantz. The 7001 and 8001 boast 4 HDMI inputs Ver 1.2 and the 8001 has 2 outputs. If you have a couple of extra bucks and are willing to shop around, the 8001 won me hands down over the 7001 because of the copper clad case, toroid-based power supply, and Current feedback amplification. Another deciding factor was the Marantz's user freindly remote and easy setup, macros were simple to set and there is no longer a need for any advanced remote other than the one supplied with the 8001. After seeing the Denon remote and hearing horror stories of 2 and 3 day setups, it was just another point in Marantz's favor. The 7001 is superb, but the 8001 takes it over the top, I thank the salesman on the other side of the country who sold me this fine peice of electronics daily everytime I turn it on and shake the walls with the best listening experience I have ever had in my own house.
Marantz SR8001, Marantz DV7600, Samsung 5030 50" Plasma, Boston Acoustics Lynnfeild VR965's, NHT Classic 3's, NHT Classic 3c, and soon to be added 2 homebuilt 1000 watt 15" Madison subs