Hey Randersen,
For what it's worth, I have the Sharp 42D72U, very similar to the 62U series.
As MDS mentioned, many Sharp's have an issue with banding. It's not noticeable in the stores because the display screens are usually set to very vivid settings. When I got my unit home and set it up to a more natural setting, the banding did... and is... noticeable, especially when displaying darker material. On nice, bright, happy movies it's not an issue.
I've decided to keep my unit. MDS stated it very well when he said that all LCD tv's have some problem or other... it's just which one's are you likely to live with. The Sharp does have a beautiful, natural picture and decent black levels. However, the banding issue may or may not drive you nuts. On my unit, it appears as a slight shadow running horizontally across the lower third of the screen, a couple of inches thick. The question is... can you live with it? If Costco has a good return policy, fer sure... try it out. And don't be affraid to play around with the settings. It took some tweaking to get the picture right.
Hope it helps.
sleeper.
P.S. Oh.. and gaming on it rocks!!