i just returned that tv. my lip sync was off a bit too but the biggest problem i had with that tv, was spots and streaks in the pic. the streaks were very noticeable when the pic panned across the sky or walls. i could even seem them on close ups of peoples faces, if they moved around a little. tho they were very faint, once i spotted them, i picked up on them a lot
also, when i loaded up the Netflix app, when the Netflix logo comes up and the screen is full of red, i could see streaks or blotches in the pic
if i were you, id look into that problem very carefully too. you dont want to be stuck with a tv that does that. luckily, Costco gives us 90 days to return TVs.
im about to return my 3rd tv in 3 months. all 3 had light streaks or spots on the screen. 2 were LCDs, made by JVC and Vizio. the 3rd is a Samsung backlit LED