I have had my 50A2000 for about a month now and PQ for HD content has exceeded my expectations. PQ for SD is pretty good - very acceptable considering the TV has been designed to receive an HD signal. I have no green blob, tinge, or anything on anything. Why there are probably some duds out there, I think the vast, majority of these models are great OOTB. I looked at every type of technology out there, and although PQ is ultimately a subjective thing, you should trust your eyes - Yes this model that is priced less than all of the flat panels delivers a picture that is better (response time is better for motion - SXRD, and black levels cannot be beat.) LCoS makes movies look like movies and not digitized cinema. LCoS smooths out the pixels enough to retain the film-look. I was not as impressed with DLP, Flat LCD - even the XBR2.
Buy it - and then get the 5-yr extended plan through Sony. They don't cover the bulb over normal usage, but at only $249.00 for 5 years it pays for itself, becaus ethe big box stores' plans cost more than double for less time. They might cover the bulb, but the bulb only costs $200 and will probably get cheaper as the newer sets come out in future years...