Ok guys I've been home with my new 55LM9600 for over an hour now.
While reading through the forum I laughed when Adamdot78 gave us the easy way to tell the build date by serial number and then Adamdot78 said "easier than September 2012?" Truth be told though, Adamdot78 gave some really useful info because the serial number is on the outside of the box but I did not see a manufacture date on the outside so I knew I had a July build without even opening it. My store only had that one in stock so even i wanted to try to go back for an exchange for a later build, it wasn't happening tonight, so I tore the box open and put the stand on.
When I turned it on for the first time I did notice some flashlighting at the corners. Maybe that's not the right word for this set because I came from a Sony Bravia XBR5 and the flashlighting was definitely more of a flashlight pattern wheras these were just kind of lighter spots in uneven patterns. Anyway, I didn't think it was too bad and I remember after calibrating the Sony the flashlighting was at a very acceptable and non distracting level, so I was wasn't worried and was pretty confident that I could minimize that through settings posted here.
I let it update twice to get me to the current version.
My Xbox 360, My PC, and My PS3 all route through a home theater system via HDMI right now and then out to the TV in HDMI 1. (I will have to change this later and at least connect my PS3 directly to the TV because my theater system, Sony HT-IS100, is not 3D ready as I researched that prior to buying the LM9600. For now though, that's how it's staying since I don't have any 3D content anyway) I have my cable box on HDMI 2 with and optical cable running back to the theater system for cable box sound.
First thing I did after the updates, was turn the Xbox 360 on because this will be on most of the time. (I even have a cable card hooked up to my computer and I watch TV through the Windows Media Center using XBox, so between, gaming, Netflix, and live or TV from the Media Center, my XBox is on for 90% of my TV usage.) Leaving the input at HDMI 1, I immediately put the picture mode to Game and started playing around. I did not use any professional tests, but I did not notice any lag time at all with my movements on the controller and what was happening on the screen so if there is some going on it's negligible and certainly wouldn't take away from my experience. (however when I get shot and killed online playing Halo, I may still blame the dumb TV just so the blame goes somewhere!!) I was then going to start dialing in settings for game mode but when I looked at the settings on the review at FlatPanelsHD (http://flatpanelshd.com/review.php?subaction=showfull&id=1338560188
) they were using expert1. So, being concerned about potential lag I renamed my HDMI to PC because I thought I read in these pages that it helps and then proceeded to calibrate as best I could to the recommended FlatPanelsHD setup. I think there might have been a setting that wasn't available (maybe because of the PC name of the input?) and I think there might have been a color setting at 50 that I didn't see mentioned in that review so I left it alone. I then checked response time again with my controller and I noticed no lag at all with the input named as PC and picture mode as Expert 1. I then checked the screen again with dark screen and the flashlighting/light spots were almost gone and hardly a bother to at all.
So far I am very happy with this set and look forward to sharing more of my experience here. That's all for now; I have a new LM9600 to play with.
P.S. I really don't like the remote and will definitely be buying the one I saw posted somewhere in these pages or maybe another forum.