The title track ("A Song") is epic, dark, and so quintessentially reggae with cutting synths, a big chorus, driving bass, back-beat guitars, and I believe timpanis (timpanii?) from time to time. But, on an album this good it's just not possible to pick a favorite. So I won't.
I know I've thrown a lot of dub and reggae your way recently, but trust me--this one is essential. And out of print.