It's not my TV! The jumping/dancing pixels only appear when watching cable-tv channels with the new AT&T service. The issue does not appear when viewing Blu-rays, video games, or over-the-air broadcasts. I also checked all the inputs and cables. Whew! I can relax now.
(though I might switch back to my old cable-tv provider
Blu-ray movies looked great. Broadcast HD looked great. Video games looked great, and there is no significant lag to report... I played all types of games; first-person-shooters, racing, hockey and various other action/adventure titles.... and things were just as quick and smooth as any other tv I've owned, plasma or lcd, so that's great too! I just wish I didn't have to go to bed, or go to work tomorrow. lol
I haven't done much tweaking yet, but following the advice in the thread I switched to Natural/Low, and this seems to provide a good starting point for viewing movies and tv. And having a screen this size really makes me feel like I'm viewing my own private little theater. It doesn't feel like watching a regular tv.
For games I prefer a bit more punch, so I'm experimenting with various settings... trying to find the best starting point for those.
I will post again with some pics once I get things adjusted a little better.Thank you
to everyone who answered questions and helped me during my decision to purchase. You guys are great.
The big-screen fun has begun.