Integra DTC 9.8/Emotiva XPA-5 certainly has the edge in power and scaling. The Emotiva should be better equipped to handle the speakers, though I am sure the Denon would do fine. The Denon adds the convenience of being in one piece of equipment, which certainly has value.
You could throw the Yamaha RX-Z11 in for consideration. From my understanding it's scaler performance is top notch. Where did you hear/read the Denon's scaler wasn't implemented well?
IMO, you should wait for the new Emotiva pre/pros to come out.