Just got my 70 on Friday! There is a real derth of photos on this thread so here goes:
Awesome picture quality! This set is huge; it is definitely the center of attention. This photo is taken with a 21mm lens which makes the set look smaller and the area look more spacious than it is. My first thought was, "Man, I've got to return this for the 60." But you get used to it. Although the size dominates a small room, the immersive effect of 70" is well worth it. Screen to eyeballs = 11 feet for me. As you can see, I'm waiting for my surround sound system.
1) I'm new to this, but ran the AVIA disc as best I could. Turns out the White Level (Picture) was correct at the default MAX setting. The Black Level (Brightness) was also right at 50 with this test, but when I put up a 0 IRE (black) test screen which had 4:3 bars on the sides, I had to lower
the Brightness to 47 before the picture was as black as the side bars. Saturation was a difficult test to do and more subjective, but 50 was about right. On the Hue test using the supplied filters you look through, I found Red, Green, and Blue to be right at zero, within the limits of the test (+- 5%). I guess this means no significant red push on mine. Fleshtones look great.
2) Over cable, HD Discovery looks excellent, but if you get up close you see a lot of mosquito noise. Other HD channels are highly variable, sometimes disappointing. I think it's compression and not the set. I'm seriously thinking of trying out the Algolith Flea
2) For other settings, I use Auto 2 on the Iris, Low gamma, and Medium on the Black Corrector. I don't really understand this last one and I see others set this to Off, but it does give the picture more punch, or contrast. Suits my tastes.
3) Avia does have a Sharpness test. I found it very difficult to see the changes when adjusting the setting, but I think 25 is good. I change the Detail and Edge settings between Low and Medium, depending on my mood. To my novice eyes, I find most of these changes to be very, very subtle. Maybe it's compression artifact from cable that's obscuring and overwhelming any effect of these settings.
3) I do have some concerns about the set's deinterlacing capablility. I find DVD's look better with my inexpensive Sony player set to 480p output rather than 480i (yes, Cinemotion is on Auto). On HD, if I pause the DVR (SA 8300HD) I have seen combing artifacts when a white diagonal line is seen against a dark background. It's not really evident at normal viewing distance, but you can see it up close.
4) Info about my stand can be found here
This is my first HDTV. I am thoroughly enjoying my set. I was worried about DVD and SD quality at 70", but it greatly exceeds my expectations. I'll post some screen shots later today.