Goodman's GTV42P Video Game Stutter Problems?

Hi guys,

I've just bought a Goodmans GTV42P 42" Plasma for £1050 from Empiredirect. So far I'm reasonably impressed with it, however this week I have been trying to play Xbox Pro Evo Soccer on it and there's a constant mild stuttering whenever the action is quite intensive. At first I put this down to the change on Xbox cable, but after changing back to the original cable this made no difference. I have since tried another XBox and another game - FIFA 2005 and the same happens again.

So does anyone have any idea why this I get this stuttering? IS it just a sh*te plasma TV or do I have a faulty unit?