Hi. I currently have a Pioneer 636 (my second pioneer machine, 1st suffered lip sync) and having upgraded my TV to a Panasonic TX36PD30 now have component input and progressive scan capability. I would like to stick with Pioneer, as I believe them to be superb on picture quality. I would appreciate anybodies input on whether buying something like a Pioneer DV575A would be considered an upgrade. The reason? The 575A is less than half what I paid for on the 636D.....so would this really be an upgrade? The machine gets a best buy, but only against other machines of the same budget price range. I appreciate picture quality should be better through progressive...but I do want to upgrade....not just replace. Any thoughts anyone? Anyone who owns a DV575A or DV470 (another to consider) please comment on quality etc. Much appreciated.