I'm thinking about buying a receiver and a pair of speakers. How do I know if the receiver has enough power to power the speakers I am thinking about purchasing. Will the Denon-3805 be able to power a pair of Definitive Technology BP2002 speakers or Aperion Intimus 522D-PT speakers? How do you determine if this Denon receiver has enough power to power these speakers? In general, how do I determine if a receiver has enough power to power any pair of speakers? Any help would be appreciated.