I ordered the Oppo and I am very pleased with it. Initially I couldn't get it to switch/upconvert to 720p and Oppo's customer service solved the problem immediately. You cannot switch/upconvert while a DVD is playing. You must press the'DVI' button while the player is stopped.
I also noticed that Oppo has a DVD recorder in the works. When I was comparing upconverting DVD players with DVI or HDMI outputs I noticed that the Samsung models looked very similar to the Oppo. Could it be that they are both based on the same platform? Does Oppo produce the Samsung models that feature DVI/HDMI?