They finally changed my TV with another one and now i have an extra problem. Other than distortion around fast moving objects now i have high pitched noise too. I didn't get that these people do not even check the replacement unit before send it to me all the way from west coast to east coast? Now i contacted with a rep and he or she said they can change it again with another tv which is m3d420KD.. Wow and she had enough overconfidence to tell me that that kd model has lower specs than mine. I was rofling while i am getting this conversation with a rep. I mean come on what is this a joke. Then rep said they can send me 47 inches of KD model which has almost same specs with m3d421sr. Well that was kind of convincing but come to think of it i am happy with all features of 421sr s other than these problems high pitched sound and distortion around fast moving objects. What do you suggest ? Should i wait another m3d421sr model to become available because rep said it looks like they don't have any unit for exchange, they will check warehouse or should i choose to replace it with m3d470KD ? I just saw some bad reviews this tv too, so i am not sure that i should insist on 421sr or should go for 470kd? I need your help quick guys.