I use a DLP front-projector, and the PS3 does a much better job with standard def than Oppo, I also have an Hd-A1, and upconversion is about at par with the PS3.

Forget all big-box upconvertors - they really are a waste of money.

As an added note, I feel that people who think upconverted DVDs looks as good as Blu-Ray/HD-DVD have either poor eyesight, or horrible TVs.