Today I got my new Samsung 52A650. I spent a good 6 months following some foruns (AVForuns) and decided for the sammy. For the price it was the best I could find (and my wife loves the design). I'm still making some adjustments but I've seen Happy Feet hddvd (CG animation is the best to show off a tv) and Fighter Pilot (also hddvd). I'm delighted so far
I could not "test" any TV in a store because the stores are too bright, this is what makes the forums important, you can check what others are seeing in the dark.
Just remember there's no such thing as a perfect TV. All TVs have faults, just choose one that makes you happy
Don't expect perfection.