Panasonic overscan problems?

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Hi all,

I'm a first time HDTV buyer and this forum has been most helpful on hdmi, blu ray players, blu ray movie discussion, 720 vs 1080, plasma vs lcd(the general conseus seems to favor Plasma, so I'm leaning that way), and I'm narrowing down my choices. These Panasonic plasmas, the 50px80u and 42px80u seem good, but I keep stumbling upon something about overscan problems. People have said you can't turn it off on the 50". Does that mean I'd always be stuck with an image that was cropped in some way? If this is a problem on the 50px, is it widespread throughout that line and others from Panasonic?

If there is an overscan problem, what does it affect? I'm mainly going HD to watch blu ray.

I'm really looking for the best set $1000 or less that is between 42-50" and these Panny plasmas seem to fit the bill rather well, but, I also don't want to be stuck with something that has some kinda critical picture flaw. thanks