Hi ,
Do you have only BL6000 ? Cos usually they where used like rear speakers or for saround setup or like additional speaker.
 They have lack of deep  bass  on low frequency, but in my opinion they produce really detail sound.
Of course BL8000 is much better speakers!
May I suggest  to put additional pair of BL4000 (really  good speaker) and see what will happen. BL4000 is much more cheaper than BL8000, and if you dont like it you always can move them to other room.
Hope it helps 
 
										    
									     
									    when your Black Label begin to taste like juice just take shot or two of Absinthe and 
after that quench with some vodka, if you still feel juice like take beer
 with grappa !