Summary: If your spending the money on this beautiful plasma TV and you want to get the best out of it then you should do it the right way. Dnice is a professional TV calibrator. If you go to highdefjunkies.com and search for P55ST50 you will see the settings thread. Go into that thread and download the slides. You can put the slides on an SD drive or a USB drive and plug them into your TV.
Summary: Solid picture- especially good black level and accurate color. Some of the well-documented issues persist (ABL, crosstalk in 3D, some noise in dark scenes, etc.) For me, however, it's the audible buzz that is the potential deal breaker. On scenes with even some bright content the buzz can clearly be heard over low-mid volume content from 10 feet away.