what are we trying to determine? if f8500's buzz, or if 60's are more prone to buzzing than the other sizes?
I don't think knowing how larger you sample size is tells us anything about these questions. it would just give us more or less faith is what we found. .1% sample size wouldn't be as convincing as a 1% sample size.
but I don't need to poll 300k owners to see a trend. if we polled 1000 owners, and discovered that 600 of them own the 60" and 12 of them complain of buzzing and 200 owned the 64" and 4 of them complained of buzzing, then we'd know the only reason 60's are reported more often on these forums is because they are more popular.
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1130K, 7.1/5.1.2 audio
Sources: HTPC(Enby), PS3, XBOX360, Wii
Control: Harmony One