Well, I have now had a chance to try 3 of the (possibly) 4 screens for the M1710.
Mine came from the factory with the Sharp screen, which had such amazing light falloff that when I was positioned dead center on the scree, the left and right were noticably darker than the center. Moving my head back and forth would move the "curtain of darkness", so it wasn't a lighting issue, just a bad viewing angle.
Next, I got the Samsung SEC3155 as a replacement. I've lived with this screen for about three weeks to a month now, and it is a marked improvement over the Sharp. Still, as I move my head up/down/left/right, there is still that "curtain of darkness" that moves around, but at least when I am dead center, the screen is fairly uniformly bright. It is still annoying, though, having that "curtain of darkness" affect. So, I had Dell ship me another screen, this time the LG.
The LG screen is much better with respect to the "curtain of darkness". Probably at least half as noticeable as the Samsung, and wayyyy better than the Sharp. The LG has even brightness across the display, no bad pixels, and the sparkle effect, when noticeable, is about the same as the Samsung. I do notice, though, when I turn on or off the computer, the LG screen goes COMPLETELY WHITE for a few seconds. Neither the Sharp or the Samsung did that. I do notice, too, that the LG is a little heavy on the RED channel. I can adjust that in the nVidia color correction, so that is no big deal. (BTW, anyone with the LG and who has color-adjusted their display care to share their settings?)
So, for now, it looks like i'll probably stick with the LG panel.
Should it be this hard to get a good display with your notebook?