I spent around 30 minutes today at Circuit City and came across the 61a750. I tried various different settings (turning on and off DNR, black enhancement, dynamic contrast, raising and lowering sharpness, etc), but no combination seemed to make this tv as sharp, colorful, or bright as the nearby lcd's and plasma's, or even the Mitsubishi bulb DLP's. I do admit though I didn't adjust everything verbatim according to page 1 since I forgot to print out the settings list. For most of my visual testing, I was standing about 9-10 feet from the screen, centered, and at correct eye level.
I also noticed if you got fairly close white letters had a reddish outline, similar to a convergence problem on an old CRT rear projection TV. This similarly seemed to happen on the larger 67a750.
Like others have said, if you squeeze the frame you can see the picture bend towards the edge, but it takes a harder squeeze to do so on the 67.
The picture was not bad, especially for the price to size ratio, but it seemed like there might have been some small step/setting I forgot to check/adjust that would have really made me see the wow factor. Are there any settings that have a major impact I should try adjusting when I go back? Also, I noticed it was hooked up via component instead of HDMI, would this cause a big impact? The source material was the generic "Welcome to HD, here is some pretty stuff, and advertisements" feed that gets sent to every TV in the store. There was some pretty strong lighting overhead as well, and it was about 50 feet to the left of the entrance with fairly large windows. Perhaps it has just gone bad from being left on constantly without any TLC, and a newer model wouldn't have these same issues?
Thanks in advance for any insight owners might be able to provide.