question... Do I need to upgrade my? cable (att) to HD to get a good picture. I'm sure HD cable would be a better picture, but is the standard cable, since it's all digital, be good enough. Also, how will my DVD player (about 7 years old) and wii look? Do I need to buy new cables to make them look better? I don't want to spend lots of money on a new tv only to wind up having to up grade everything else.