I have a 409 and my set is perfect no swapped audio over hdmi no buzzing very slight geo probs but dont cause any loss of enjoyment when watching tv and other family members have not noticed anything.
Same blurring in bottom right and left but again only noticeable on sky news tickers but tbh my old sanyo 28" wide did this aswell.
so i am happy with mine but i think most of the probs have been with the 419 model.
Just noticed by the way that the suppliers i got mine from (thro work)arent listing the 419 anymore i originally could pick either the 409 or 419 damn im pleased i didnt go for the 419.