I haven't spent too much time using the Mac as a DVD player. This is an obsession for a group of folks over at AVS Forum, including topics like using the Mac Mini as an HD recorder...
Try this link:
http://www.avsforum.com/avs-vb/forumdisplay.php?f=115
Try this link:
http://www.avsforum.com/avs-vb/forumdisplay.php?f=115