I would be interested to hear if anyone has experienced the directional, beaming buzz from these sets. I returned a pn60e7000 due to this buzz (which went from hardly noticeable on day 1 to unnerving on day 29). I have critical ears and thought this buzz was a characteristic of all 2012 samsungs. Until today, every E6500 and above set that I have seen in showrooms has exhibited this directional buzz, which has a "buzzzzzz" undertone with a higher frequency "tick-tick-tick-tick....." overtone. It beams straight out of the panel.
I think the reflections of this sound were worse than the actual source. Because the sound beamed straight out, not to the sides, the reflections off the back wall (behind your head) made it much more noticeable. I found acoustic absorption behind the seating position tamed a significant amount of the buzz. This could explain different experiences with the buzz, as the acoustics in each room are different. The progressive increase in buzz ultimately made me abandon ship.
I saw a pn64e8000 in BB today and lo and behold, no buzz. So this tells me that the buzz is not an inherent "feature" of these displays, however common it may be.
My finger is on the trigger for a 64 inch F8500. So tell me, owners, does this set sound like a deep fryer?