Hi I have recently purchased an onkyo 905 reciever which is powering some B W xt series speakers the xt4 xtc xt2 pack with a pv1 sub. It sounds amazing and is great 90 percent of the time. On the odd occasion you wont to seriously blast a film out the spakers are capable of so much more than this amp can throw at them. What are my options is there a more powerfu reciever out there or do I need to add an extra amp into my package. Any thoughts.