Sorry, but I don't have DCX700, maybe you are confusing with another post.
Certainly it would be good to try another DVR with my Panasonic TV. Besides, for what I have read, when it comes to the different flavours of HDMI playing together, it is not always that black and white.
For now I am happy with my setup, the only slight downside is that there is noticeable buzz (60hz?) at higher volume level, maybe due to a ground loop.