Hi, I am a Yami fan and am very pleased with my Yami/Axiom combo (except that I now need a bigger room, sound proofing, vibration control etc etc). While I don't know how the Denon's go, the big one for me was the 1080p/HDMI switching as I personnal want to feed evything into the Yami then pass the selected Video feed to the TV regardless of source format / connection.
Let me know if there are any specifics you would like to know!
PS - The V2700 seems to be fussier than the V2600 from which I upgraded in regards to HDMI detection. I have not tested it fully but, you seem to have to turn on you HDMI device (in my case a HTPC connected with a DVI-HDMI cable) while the device is selected on the YAMI. Once the conneciton is established you can then switch to other devices and back again (you can even put to and from Hibernation). If I boot my HTPC first and THEN switch to it on the Yami I get no signal and the HDMI light does not come on.
HT:M80s,VP150,QS8,EP500 Outside:2 Pair M3 1 Pair M22 Office:AudioBytes, Games Room: M60,VP150