If you can afford it, the Pioneer PDP5020 is the best.
However, only by a "hair" over the Panasonic 50PZ800. The PZ800, when set to THX mode, has the most accurate color and deep black levels (almost as deep as the Pioneer). The Panasonic is the BEST VALUE, because it can be found for as much as $1,000 LESS than the Pioneer.
Have been researching this for a year now (actually lost interest for a while) and need to make a decision.
Would love a 52" but can't find one. So is bigger or smaller the smart choice--have a good size room. Am down to Panasonic and Pioneer. Of the Panasonics, I am confused about the different models... What is the difference? lots of numbers and letters that mean nothing to me. Even the Panasonic web site was unhelpful in deciphering.
S

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