A while ago I ran across The Millenium Simulation project that uses supercomputers to process 3D visualizations of the large scale universe. The structure & distribution of galaxies and dark matter can be explored using this model that also has great aesthetic value. Because the link above uses a movie format I can't view, I could only appreciate the still pictures.
Boingboing.com linked to a website for a DVD called Galaxy Dynamics.
The menu has very cool Quicktime animations of cosmic processes enhanced with trippy soundtracks. It's the closest thing to having your own rave-powered spaceship.