I got my 8470 (BJs model) two weeks ago, and I'm still getting stuff up and running, but it's been great so far. I used CGGorman's settings, but with some tweaks. I decreased the brightness in standard mode, as I was getting a suntan from my chair, I put Aquomotion on in standard mode, and I changed the color settings quite a bit for game mode, as CG's settings work fine for XBOX, but for Wii (scaled through DVDO EDGE) they were a mess, and the home screen looked way too warm with muddy whites, so I turned the color settings significantly cooler.
One "issue" I have is that even with the DVDO EDGE, Comcast looks like sh*t on some channels. I tried it with and without the EDGE, and it looks a tiny bit better with the EDGE, but even then, there's a ton of compression artifacts and problems with the edges of the text. There's not much I can do about it, I think it's because of Comcast's triple channeling of HDs. Previously, I watched Comcast on a different system on a Sony 55", but I was sitting another 3 feet away from a smaller TV (11 feet vs 7 feet), so I didn't notice it as much. The 8470 looks AMAZING with VUDU HDX movies, but I'm just a little jealous of FIOS on the TV side. Unfortunately, here in CT, we don't have FIOS, and I'm not going to move 20 minutes away to Rhode Island just for TV.
I'm using an Onkyo receiver, but it has no contact with the TV, as the DVDO EDGE splits the Video and Audio signals down two different HDMI cables, one going to the TV, and one going to the AVR.