The offspring of ELP continue the '70s prog rockers' quest for adventurous instrumentation, towering arrangements, and deep meanings. Heavy-rockin' Swedes Opeth explore their folkier side with the tinkling acoustics and lilting melody of “Will O the Wisp,” while The Mars Volta and Muse hit the hyperspace button, reaching operatic heights with thundering drums, skyscraper-sized riffs, and gymnastic vocal leaps.