Can anyone advise on the Sherwood Newcastle R872.

I have the EPIC 60-500 7.1 system and like to view action films and rock concerts, but find the receiver doesn't have the guts to drive the speakers very well. I have performed the setup, but find almost full volume to be very unfulfilling. Source is a Sony PS3 linked via an HDMI cable. I'm just not getting the performance from the front two speakers.

Any suggestions

Cheers

Tim