What I find to be the biggest difference between DTS and DD, is that the sound is more enveloping in DTS. Sometimes I could swear that there are speakers all around me, and not just in the front and back. I am still only using a 5.1 setup. It does seem that Dolby Digital has gotten better though.
My picks for best DTS movies would probably be:
Twister
Lost World (Jurasic Park)
My picks for best DTS movies would probably be:
Twister
Lost World (Jurasic Park)