I just got a Pioneer PDP 506 XDE (great looking TV, awesome picture) but I am really not enjoying it. Reason being that there is a constant high frequency buzzing coming from the set that can be heard 10 feet away, and gets worse when the picture is brighter. Now I have read about this problem with plasma before - many posts on this site, but was wondering if anyone has had this problem with the new pioneer? in my view the only sound you should hear should be from the audio on the program, not a constant buzzing. Any thoughts?