Originally Posted by $$Buck-Naked$$
Perhaps it has to do with firmware and or equipment used. My brother has another firmware on his VT20 (European edition) and he has noticeable better black levels with the same settings and same hardware (DMP-BDT300, PS3, Xbox 360 and HD cable stb). I have firmware v2.100 and he has v2.103. That bunch of mofo's over at Panasonic just won't put that or higher firmware online.
Well, certainly you are getting into such low black levels that the type of meter being used, and how well calibrated it is, not to mention how carefully the measurement is taken all comes into play.
If history repeats itself the 58 and 65 panels will have slightly lower black levels than the 50 and 54.
Also, if the black level rise follows the same pattern as last year then the larger sets will only see about a doubling of original black level, which means that even after doubling you will still have black levels on par with earlier Kuro tech.