Ok I pull myself away from the 6168 for a few minutes to give some impressions.
For anyone hopping rainbows were a thing of the past - sorry, under certain conditions they are still there. We watched Ghost Hunting (or some such thing) on SciFi channel standard def. They were in the dark and filming in black and white. I saw some rainbows - not enough to bother me in any significant way but they were there. Have also seen them on a few other occasions - typically high contrast lots of movement. Again nothing that bothers me in any way.
In setting up connections I have the set pulled out from the wall and was watching from ~7 feet. An old cheap (well not so cheap at the time) DVD player connected via component. All I can say is the picture is outstanding! I have made no changes to the settings. Out of the box the settings are set to standard, warm1. Not bad. I have spent a few minutes watching a DVD that someone in another thread put together to show off your home theater. Consists of about 20 clips of different things. Optical from the DVD player to an Onkyo AVR. I have seen absolutely no audio delay in any of the clips.
Standard definition from Moto 6412 STB is certainly acceptable at 9'. Digital better than analog and HI Def everything you could expect. Again optical from the STB to the Onkyo. Have seen no audio delay so far. Baseball on ESPN HD is extremely good.
I'm sure my son will get the HD connection pack for his XBox tomorrow and we can report on how that goes.
Latter - it's back to watching and pushing buttons to see what happens!