I have just become interested in this line of Receivers. I currently have the Denon 4310 and am in discussions with another store about what this product line has to offer. He claims that though there is no 80.4 on the Integra website, it does exist... and is apparently amazing.
Anyway, looks like my previous concerns about: Pioneer SC-68, Denon 4520 or Onkyo are all being trumped by Integra, either the 70.4 or the 80.4. The feature spec sheet looks to pack in all that I was trying to get out of my circling around the other items and of course you can add to it the fact of quality.
Should be interesting but if anyone has a 70.4 or a 80.4 I would be very curious to see what they thought about it paired with an OPPO 103 BD Player.