The Denon 3910 is hard to beat for $450 used. With HDMI, DVI, S-video and component video out, it's more flexible than other units. The video is simply stunning and audio is on par with other players in the sub 1000 category. Here's a worthwhile review:
http://www.enjoythemusic.com/audiophileaudition/0505/denondvd3910.htm
http://www.enjoythemusic.com/audiophileaudition/0505/denondvd3910.htm