Most bands I listen to are relatively "famous," even Cynic is known by many. But I have to agree that their album is one of the best to come along in metal. Though, I never understood the "jazz metal" label, I don't hear anything that reminds me of jazz in their music.
Check out the re-release of the album though, they remixed some songs, and re-mastered the whole thing. It sounds much better. They even added some Portal demo tracks, which are just as good as the Cynic tracks.