I read in this forum that the 9520 is the new model of the 9509. My 9509 has the dirty screen syndrome and vertical lines and today the tech. from the shop we bought it from saw it and said they would change it. But the 9509 is no longer in stock.On the Philips site the 9520 is not listed? Plus I've seen the 9520 on sale on-line for up to 300 Euro less than the 9509! Why would that be? The tech said as we were still paying for the 9509 (we've had it a month) by credit card installments we had to choose a TV (any make and model) that was the same or higher in price! Now what should I do? Better the devil you know? OR Take a chance with a different model or make!? Any ideas?