Was all set for a top of range Panasonic until the reviews of Sony 853 & 753. But what is this " so-so DVD upscaling " mean? I currently play all DVD via sony blu ray into a w4000 set. Is it true to say that these sets are excellent in all but SD sources? I watch alot of old analogue material archived to DVD from a Sony DVD recorder. What im saying is. If I'm prepared to pay £1800 for a Sony flagship model, shouldn't it produce the best possible picture and sound acccording to source?