I just picked one of these up, and I'm having the same buzzing issue. In brighter scenes, especially with HD content, there's a very audible buzzing coming from the TV. If I move my head around the unit, it sounds like the bottom rear is the source. I also love the picture, but I'm not sure I can handle the buzzing... and I don't feel I should have to 'deal' with an audio annoyance from a TV at this price. I almost feel like it would be less frustrating if the buzz was constant... at least my brain could tune it out after a while. But the TV will be whisper quiet on a tight (mostly dark) shot, then it will cut to a wide angle with lots of visible sky and the buzz will kick in. It's jarring, and I'm also kind of surprised that I read so many positive reviews of this TV online without anybody mentioning this problem.