I have owned the BAT and the bass can be a bit soft sounding. I moved from Aerial 9s to LR5s (105 lb monitors) on 70 lb Sound Anchor stands and then added two, Aerial SW12 subs. The combination of acoustic suspension (i.e., sealed box) speakers and the power and control of the SW12s have created as close to perfect bass as I have heard in my system.
Keep your 7Bs and add a pair of used SW12s on SA stands for your $4,500 and the sound will change your sonic world.
Keep your 7Bs and add a pair of used SW12s on SA stands for your $4,500 and the sound will change your sonic world.