I have a 42" plasma, I have Sky HD. Now I have seen countless threads on this site saying that, with the size of TV I have, the optimium viewing distance is 8 feet. I have also read that anything past this and I will struggle to see the difference between SD and HD. If that is the case please answer this: I am currently watching the West Ham v Man Utd game from the very rear of my lounge - making me about 16 feet from my 42" TV. When I watch the game on SD then switch to HD there is still a significant improvement - for me that dispells the theory and it really is a myth. Any thoughts?