Well the good thing is that was 2 previous gen pannys, one sammy, and a one post wonder. The buzz of all plasmas is there, usually unnoticeable unless standing in dead silent room and 3" from the display
The buzz was also reported in some Kuros as well. AVS has a couple of dedicated threads on the buzz, no pun intended. Please do not let this sway your decision on a Panny plasma as they are isolated occurrences. The buzz is no more a ploblem, than the heat generated, the burn in issue, or the electric bill you get.