Help with an audition for a prog rock band?

I'm going to jam with my friend's progressive rock band in a few days
to essentially audition to play keyboards in their band. They cover a
lot of proggresive rock and metal, but everyone in the band looks up
and absolutely loves Dream Theater.

I want to make a compilation of riffs and solos from well-known Dream
Theater tunes. Which ones should I practice and present?