My current set-up is MA br2 front, brlcr center, brfx rears, rsw12 sub, yamaha rxv2065 reciever, rotel rb1510 power amp front channels, pioneer bdp320 and marantz cd6003. My problem is with stereo music. The sound is very good midrange and treble but the bass sounds hollow. I can use my sub to help but would prefer the speakers to have more authority of their own. Am thinking of upgrading them to MA rx2, rx1 or B&W 685. Does anyone think this may solve my problem?