Hi All, new to the forums and a new owner of an NX720, although the 40". A few questions if I may:
Where is the setting for the local dimming - according all the specs i can find, this is defeatable. I can't recall exactly what the term is that Sony mentions in the i-Manual, but I cannot see it as a setting anywhere. (I have a bit of clouding even though the backlight is on minimum, hence wanting to see if local dimming would help things a bit) Perhaps this isn't available in the 40"?
Also, regarding the Dolby Digital pass-thru - I have my PS3 connected via HDMI to the TV and passing back the audio to my amp (an older Yamaha with opticals only). When gaming, the audio passes through in 5.1 without a hitch, but when watching Blu-Ray movies it seems to only send 2 channel. Obviously I've confirmed that the audio is set to 5.1 on the disk beforehand.

A bit of background - I have gone through a few TVs but have sent them all back - 4 of them were for technical reasons:
First was an LG LE8500 - excellent TV which I miss terribly. The rear-lit, local dimming LED panel worked better than any I've seen - zero clouding, zero flashlighting and halos were insignificant. This set had to go back as there was a very strange noise coming out of the rear of the TV when in HD. Second was another LE8500. This had a faulty HDMI port.
Next was an LW5700. The clouding was in the toilet. All the LGs had average input lag, even with gaming mode.
Lastly and most recently, I aimed a lot lower and went for an entry level CX520. Very good lag figures, but the "rainbow effect" drove me mad, and flashlighting in the top left was irritating. Then a pixel died.
Now I'm on the NX720 with the clouding as I mentioned, but it's minimal and more towards the centre of the screen where it's least irritating i think as you'll almost never see it. I hope this one is a keeper.
Thanks for any info you can provide.