Today's "trance" isn't really trance. It's some kind of pop synth crap. Mid to late 90's had the best trance.
http://en.wikipedia.org/wiki/Trance_music
Prodigy - Voodoo People(Pendulum remix)
http://www.youtube.com/watch?v=sMqT7-rVWzg
Prodigy vs. Basement Jaxx - Where's Your Head At?
http://www.youtube.com/watch?v=3XSq7MHCKnM
Pendulum has some pretty good music.
http://www.youtube.com/watch?v=ABqh9N-Mw5E
http://www.youtube.com/watch?v=X2sWWj9RjeQ
Infected Mushroom is a decent new trance.
http://www.youtube.com/watch?v=g39GPSYqbiU