I watched movies on 2 channels for a year before I figured out my DVD wasn't set-up right. 5.1 makes a huge difference. Didn't know movies were meant to rumble.
Rent "The Grudge" for full effect.
Yup, Bitstream decodes Dolby digital and DTS on my DVD player, PCM only produces 2 channel stereo. I just bought "Independence Day", it has some good thundering effects. I'll have to try "Grudge" too.