defiantly the hdc3's. its the same freakin company so don't waste your money on the dd9500 and just grab 4 hdc3s. i have the hd15 that thing is stupid loud and im only running 1000 to it.
If money is not an object than go with the DD's. If your looking to save a buck go with the AQ's. Either way i think you will happy. It would be nice to have matching subs and amps though...