I purchased a 47LW5300 from one of the $799 deals available over the last few days (Amazon), and I figured I'd post a few notes, tips, and quirks I've found while setting it up and fussing with it yesterday and today.
First, and most importantly, the PQ is just phenomenal. I'm not sure if it's really a different panel from the 5600, etc, but in any case, I'm blown away and very satisfied.
I was able to access the service menu with my harmony remote following the same instructions as for the 5600, and successfully enabled 5.1 out and THX modes. Interestingly, unlike the 5600, I can't seem to be able to edit the specific settings under THX using the easter egg code. Maybe there's another code out there somewhere?
Another limitation is that I can't edit PQ settings while in 3D mode. Pressing the quick menu button just gets me a "this function is not available now" message. The only options I jave are to switch between standard, cinema, and game using the AV mode button on the remote. Fortunately, I was able to verify that these modes (at least standard and game) are using my user PQ settings, so I can change them as I like, just not on the fly.
I also verified that game lag on my xbox 360 is negligible or imperceptible, at leasing using the PC input label that was suggested.
Question: should I be using the Real Cinema setting on the TV for my BR player? Does it enhance 1080p/24 sources or do anything at all?