i totally enjoyed this performance as well. debussy, schoenberg, and messiaen are three of my favorite composers, and i especially like messiaen's organ pieces. the second one reminded me of krautrock band popul vuh, very drony and ethereal. that potter piece was definitely very cool in that 20th century avant-classical vein, myabe reminded me of hindemith or even ligeti. the color of the lights was incredibly rich and the architecture of the cathedral itself is impressive enough to transport one to another dimension. it would be nice to see more avant-garde music there.
works by composers such as scriabin, gorecki, stravinsky, ligeti, penderecki, hindemith, and ives would be fantastic to experience in this context.