I am setting up a new system which will transition to a 6.1 system. To start I just want a standard 2.0 or 2.1 setup but want good bass response. Do the 340's have adequate bass response without a subwoofer? Would the 170's/subwoofer sound better than stand alone 340's? The system will be set up in a 3300 cu/ft room, only 7'9" ceiling, and at the present time I have a Pioneer VSX-D498 but want to upgrade to the Panny SA55.