What a great opportunity for the lovers of this Trilogy!  My favorite is still the first film of the three, Koyaanisqatsi. I still remember viewing for the first time just by accident, as it was broadcast late one night (perhaps on PBS?) in 1984.  I have rarely been more grateful for insomnia. I was immediately fascinated, and I ended telling my fellow students the next day that I had viewed the art of the future. I think Koyaanisqatsi is extremely influential, especially on video-artists who dwell on environmental causes.  Its images and musical gestures are to be considered rhetorical topics of our time. The Edinburgh Festival page includes an interesting report on the genesis of these works.