If you go for the BL4s don't ever play the Transformers movie or Jean Michel Jarré in China concert. Those labs just can't do the job. I would choose the BL4000's. However the best choice in my opinion will be BL3's. If you wall mount them they have the advantage that you can direct the speaker towards the ears of the listeners. There is a member in the spanish forum (Luigi) that have BL8000 as fronts, BL2 and BL3's as rears, oriented to the main listening position and down tilted in a not so big living room with extraordinary results. Besides, BL3's look gorgeous wall mounted. Obvioulsy, they are more expensive...