Agreed. I will heartily believe the Oppo will be superior than the Panny for DVD playback, hands down. However, the difference between a top-notch upscaling DVD player, and a mediocre upscaling dvd player will be much smaller than any of those two and a blu-ray player, IMO. I've compared the dvd playback of an entry Denon and the BD-30. The Denon was better, but it was subtle enough for me that it wouldn't be a big deal because I almost only watch in hi-def anyways. Personal balancing of habits and budget, per usual.
If you have a formidable DVD collection, of course it makes more sense to spend on a top notch DVD player. (Or upscaling receiver). Me? I have easily more hi-def discs than regular DVD's. GL.