If you are hooking your DVD player through coax or optical toslink cable, you receiver does the work. From your sig, it looks like you have a Denon 3805, so don't worry about movies. They will sound great

If you listen to Hi-Rez music (DVD-A, SACD), however, you will definately have a problem. Hi Res plays through analogue connections, which basically means your DVD player provides the quality of sound.