I would love to see more replys to this. I am trying to decide between the denon 2313 and Yamaha RX-A820.
Party mode seems really nice in the Yamaha and I like the iPad app from Yamaha after playing with the demo mode. Sadly pioneer has the best iPad app but I don't think the receiver hardware stacks up as well. Denon just has an iPhone app and I think it's the least user friendly of the three apps I tried. I know that point of differentiation may be silly to most on avs but I like being able to deal with all the complex options via iOS device.
I see a lot of people saying YPAO is inferior to audyssey but I just don't think I will know the difference. I'm not that highly attuned and currently use a 5.1 Sony reciever I bought in 1999. I have to depend on the tv to switch video signals. I feel like the Yamaha or denon are going to be tons better and I won't really care about YPAO versus audyssey.
Also I think the convenience of on the fly switching between 7.1 and 5.1 with powered zone 2 stereo is really nice on the Yamaha. On the denon you have to wire it up for one or the other and go change the wires to change setups. The Yamaha just changes where the last two amps send their power based on the situation. That seems great because it allows for 7.1 and powered zone 2 sound without an external amp or second reciever.
All of the above makes me think the Yamaha RX-A820 is the clear winner but tell me if I am missing something. And if your answer is audyssey please tell me a reason why aside from being able to EQ my sub. That seems like a small thing I will never do.
One other random thing I have been dying to know is if I use an analog signal in a zone 2 and a digital signal in zone 1, will there be a delay on one or the other so that the sounds are not in sync? Like if I have my uverse box doing 5.1 via hdmi in the main room and stereo sound via RCA cable in other rooms of the house. Will the speakers in zone 2 be in sync with the picture in my main room or with maybe with a second tv on the secondary hdmi output of the Yamaha reciever? Party mode fixes the synchronization issue but forces only 2 channel stereo in both zones.