I really wanted to keep this TV, but I have to return it for the following reasons:
1- As you can see from the picture below, ocassionally, this black rectangular "shadow" appears on the upper right hand side of the screen. To me, this appears to be a dimming problem, but I'm no expert. Any thoughts on what this might be?

2- Also ocassionally, but somewhat frequently, when playing DVD's (mostly Blue Ray) a band of ripplely "waves" appear on the bottom portion of the screen and kind of travel about half way up the screen before they dissapear. It kind of seems as if there were signal interferance although the media box is directly under the TV in an open space, and it shows a strong signal when I press the information button on the remote.
3- The overall image quality is not as impressive as the Samsung 8500. I saw these two TVs side by side, and no matter how much I tried to tune the LHX, the 8500 just had a crisper, brighter image.
I was going to return this one and get another one instead as I can get a display model for $2,300 (or a new one for $2,600), but I'm thinking of getting an 8500 instead, although it's a bit more expensive.
4- I also noticed a flickering effect on the right side edge of the screen as shown on the image below, but I'm not sure if it was just due to an issue with a particular channel as it didn't show when I channed the channel.

5- It has been discontinued! This worries me. Why would a top of the line TV be discontinued just a few months after it was introduced? There has to be an underlining issue.