You should use as good cables as possible. It is as mach critical for video as for audio.
If you are looking for good component cable for reasonable price, I would recommend Silver Serpent from Better Cables
http://www.bettercables.com/componentvideo.html
or Audioquest
http://www.audioadvisor.com/store/categorylisting.asp?CategoryID=16&hdnCat=Video%20Cables
Also I would not recommend Monster or Radio Shack.
If your TV and DVD player compatible with DVI or HDMI, you will get mach batter performers utilizing those connections.
Good luck!
If you are looking for good component cable for reasonable price, I would recommend Silver Serpent from Better Cables
http://www.bettercables.com/componentvideo.html
or Audioquest
http://www.audioadvisor.com/store/categorylisting.asp?CategoryID=16&hdnCat=Video%20Cables
Also I would not recommend Monster or Radio Shack.
If your TV and DVD player compatible with DVI or HDMI, you will get mach batter performers utilizing those connections.
Good luck!