I don't have a plasma, but I just bought a LCD HDTV and I haven't had any problems with burn in. The Wii and the TV both have burn solutions so I wouldn't be to worried about your plasma. Mine has a 120Hz mode that makes the graphics and move more fluid and clear. It also helps to get the Monster Wii cables. Their like $50, but blow the 1st part component cables out of the water.
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