Thank you Robert for your reply. My PS3 does not upconvert unfortunately so does my Sony SACD/DVD player. Now how do I know whether my Samsung DLP upconverts? I bought it three years ago, and I can't remember anybody talking about uconverting at that time. A samsung site search turned up nothing.

Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3