One intriguing possibility would be speakers with powered bass unit (eg Zu Def 4); the limitation of the 30A is mainly in the lows, if one doesn't listen too loudly.Exactly. In fact, going beyond a "possibility" it would be a necessity in order to obtain more or less full range reproduction.
In this respect, the Zu mentioned above are ideal on paper -- hi sensitivity, independantly powered bass, etc.
The Revels mentioned are also very good speakers btw -- but far less easy to drive. They too would need to be paired with subwoofs (Revel make their own).