Just got my 51D6500 annnddd....it's spectacular!!
So far anyway...touching a lot of wood...having read these forums on Sammys for a couple of months now.
This is my first plasma and my last behemoth of a tv was all of 32 in. so this might account for some of my enthusiasm. Haven't touched the settings but the build/mfg. date on my unit was Jan. 2012 so after a couple of hours and not noticing the "dreaded" pops (or not recognizing it
I decided to upgrade the firmware to the available 1015 (it came with 1013).
My plans are to wait for a month or so before utilizing/playing around with the settings (pokekevin's for one) recommended here. My favourite Picture mode is "Relax"....seems to have a real good balance for all the content.
Anyway so far so good...back to the TV (which btw looks great as well)...and shall report back any further experienced pluses or minuses.
Thanks to you all for helping me make my choice.