IMO:
*drive* the Amati well (I don't know your dr-8),
*place* them correctly,
*treate* the room as far as you can, and
*check out speaker *cable*...
BEFORE you invest in a sub. You'll get many returns for your efforts. The Amati are supposed to go down to ~35Hz in a room, if you play yr cards well. THEN, if you're still not satisfied, try S_F's own sub -- or any other that can play classical music well: S-F use classical music (a lot) to tune their speakers.
*drive* the Amati well (I don't know your dr-8),
*place* them correctly,
*treate* the room as far as you can, and
*check out speaker *cable*...
BEFORE you invest in a sub. You'll get many returns for your efforts. The Amati are supposed to go down to ~35Hz in a room, if you play yr cards well. THEN, if you're still not satisfied, try S_F's own sub -- or any other that can play classical music well: S-F use classical music (a lot) to tune their speakers.