I had been scoping out Denon's and other brands for a while. I finally decided on this unit due to it's features and price point. I highly recommend the Denon website for comparing different XX10CI models. So far, I have been happy with my purchase. It has a whole host of features including up-converting all inputs to HDMI, HD Radio, Sirius capable, 5 HDMI inputs, 3 audio zones, and completely re-assignable digital/analog inputs. The ability to reassign different audio and video inputs on the fly has turned out to be quite useful, something I did not anticipate. Overall sound quality has been superb so far.
One downside is menus can be a little slow to navigate through, and the GUI isn't too sharp looking. It's certainly not the XMB from Sony, but it's functional. If I wanted cool looking menus with overpriced sound, I would have bought a Sony. Features that this unit does not have include dual HDMI outputs (I don't really foresee myself having two TV's in one room), and the ability to network wirelessly. I plan on purchasing a Denon iPod dock (the -3w or -51w, I don't know if the -51w is worth the price difference) which should allow wireless connectivity to my computer. One downside that surprised me was the need to have HDCP HDMI devices connected. I have an older Motorola cable box from Comcast with DVI output, and the 3310CI would not pass the video from the cable box using a DVI/HDMI cable, so I have to use component cables. Not a huge problem, but stupid IMO. Comcast told me they won't provide true HDMI boxes unless you pay for DVR (we already have it in another room, so I didn't need a second DVR), and HDCP is just another stupid security control.
One other downside, which I'm still toying with, is the ability to select inputs with the Comcast programmable remote. (For anybody who doesn't know, the standard Comcast remote is very powerful and can be fully reprogrammed, but they don't tell you this. There are many websites with more info on this.) My roommate has an older Denon that I was able to control inputs, volume, and power with the plain old gray Comcast remote. So far I just have the volume and power with the 3310CI, while the number pad isn't quite matching up to the input numbers on the back of the Denon remote.
I ended up picking up this unit at a certain popular electronics store for $1200. It was not an advertised sale in either their circular or on their weBsite, But the posted price appeared in their computer.
My advice is to wait till this thing goes on sale, but it's still worth a GOOD BUY at full price. (I think my hints were obvious enough, no?)