Ive just bought the Optoma HD70 projector along with a Samsung HD860 upscaler. It was my intention to use this along with my Pioneer XV DV313 surround system, obviously using the Pioneer for sound ( which is 3 yrs old but still has fairly impresive sound given its age ). Was just wondering if anyone has found the HD860 to make a worthwhile difference to the picture quality ? Also should I be considering investing in a more recent home cinema dvd system ?