[BrianG]

The only trouble with integrated towers/sub is placement. Tower placement is critical while sub not so much. And often, what sounds good for mids/highs does not sounds as good for the sub. Better IMO to have seperate sub and towers. Cross the towers and sub over a no higher than 80Hz (high pass) with a 12db/octave slope (minimum) for good midbass response and to keep the sub from playing frequencies that degrade imaging.