Dave Abrams was on tour in my area, so I made arrangements to have my TC-P58VT25 calibrated. Dave did a very thorough, careful job. The set is next to a large picture window, so he taped up a sheet of black plastic film to get the room completely darkened. He's a very bright amiable guy, and I enjoyed schmoozing with him and getting an explanation of his calibration process. I work on accurate video displays in a vision research lab, but we use very different calibration procedures (referenced to photon counts). It was interesting to compare methods.
Before he came, I had applied the D-Nice THX settings, and upgraded to firmware 3.5. Dave created several calibration sets for ISF day, ISF night, ISF day (3D), ISF night (3D), and THX modes. The D-Nice THX settings were already pretty good, and the effects of Dave's changes were subtle, but noticeable. The ISF modes seem better than THX - richer colors, brighter, a bit more "pop". Dave also tweaked some arcane settings in my Blu-ray player and Comcast cable box.