Just wanted to chime in again-- its been almost a year since I got my 51F5300 BFXZA and while at first I wasnt so floored with it over my F4500, over the past year Ive come to appreciate it for the magnificent picture it produces.
Like everyone here, Ive played with settings and have settled on what I produced using the AVSHD and WOW discs, along with "Auto" colorspace. I used "Native" colorspace on all my sets for a long time, but when I switched to "Auto", everything just looked so much more natural.
I watch a lot of OTA HD, Netflix, and Blu-Rays on the set. In particular, OTA HD looks spectacular, especially shows like the EXCELLENT "Nature" series on PBS.
While I still prefer the F4500s for gaming, as most of my gaming is retro stuff without the use of external processors, the F5300 is simply a fantastic home theatre set.
I cant fathom why production was ceased on plasmas-- my folks and my in laws both have LED/LCD sets and they dont even begin to compare to the PQ of these plasmas.
Displays: Samsung PN51F5300BFXA, PN51F4500AFXA, PN51F4500BFXA