Their music (Wikipedia) is some of the most emotional I’ve ever heard. Combining elements from ‘70s prog rock and bands like My Bloody Valentine, they manage to produce something completely unlike anything else in this world. Standouts include Starálfur from Ágætis Byrjun, Hoppípolla from Takk…, and Festival from Með Suð Í Eyrum Við Spilum Endalaust. But really, all their stuff is great, and Jonsi’s voice is… unique. Start with Ágætis Byrjun if you want to jump right into the deep end, or with Með Suð Í Eyrum Við Spilum Endalaust, which is their “poppiest” record.