Hi, I dont know much about rear projection TV's, Im not even sure if this is the correct thread but can someone please help me? I have been offered a Panasonic 47" is has dolby surround sound, picture in picture feature, i dont know the model number for £450. Does that sound worth it? What sort of things do I need to look out for on them? Is there anything else I should be wary about? It has marks on the screen but it doesnt look that bad when there is picture going through it. He says that it is marked because of the cloth and liquid he used to wash it once. If someone could help Id really appreciate it.