I have a Samsung DVD-HD841 (refurb unit) and connected to a 42" DLP via supplied DVI cables. On occasions that my player works (it's picky and would sometimes not even read brand new DVDs) I can upconvert the DVI output from 720p to 1081I. But the difference in video quality is not as dramatic as I would expect. But since I got this one at a bargain price of $50, I'm not complaining.

Go ahead and spring for an upconverting dvd player ...just don't pay more than $100 for it.