Good, at least the sound is sorted, so we'll get back to the plasma for now.
If you are going to stick with standard DVD's, and not upgrade to HD-DVD or BlueRay HD DVD's, and NTL, PWD8 is the way to go. I won't be upgrading DVD's to HD and I also have NTL.
The opinions on the screen having "just" 480 lines on the PWD8 is one which divides many here. Keeping it simple, ignoring NTSC DVD's, and assuming your DVD does not upscale automatically to 720 or 1080.
My opinion is the picture from your DVD is a standard Pal of 576 lines. So your DVD will pass a 576 signal and the PWD8 will down scale to it's 480 lines. For NTL it will downscale the same 576 down to 480. The other way the PHD8 upscales the 576 to it's 768 lines in both cases.
So either way, if you are sticking with a standard definition picture of 576 lines, getting either plasma will mean scaling of some kind, either up or down. But the cheaper option is the PWD8. And if you got the PHD8 you would not be using it's full potential of being able to show a full high-def picture in stunning quality.
Don't get me wrong, if you have the cash, go for the PHD8. Future proof, and some say it shows a standard picture upscaled "slightly" better than the downscaled PWD8, but that is arguable
But as I said before, I don't see a large enough quantity of HD coming my way soon, so I chose the cheaper option
Cheers
Andy