Gospel is the most inventive band to ever be associated with emo. Though that's a lofty claim, I think I'm off the hook because of emo's inherent narrowness, and the fact that Gospel isn't really an emo group. When they broke up in 2006, apparently they were working on the follow up to The Moon Is a Dead World. The only artifact of that creative process is the bootleg The Magic Volume of Dark Matter. It was recorded on February 2nd, 2006 and shows Gospel going deeper down the psychedelic, progged out rabbit hole they were first exploring on their debut LP. The song is 23 minutes and runs through a ridiculous number of section changes, them jamming out all the while. Though it's a rough cut and there's probably a lot of improvisation, the track is absolutely awesome and serves as a pleasant if underwhelming swan song for Gospel's too short career. Thanks to Jared from Last Train to Cool for the look on this one. Included is the bootleg and a live video of the performance.
The Magic Volume of Dark Matter  - Download