BEOKNOW:
The sound quality on the BV8 40 is superb compared to the BV8 32, and I would say it is equally as good as the Avant - probably better!
I agree, the sound was also my main concern when buying the BV8-40. I use it in a setup with BL1/BL2/BL4000 and it works very good. The only thing I notice is that the setup tool for the speaker volume seems to set the volume of the attached speakers to hard compared to the center channel (BV8-40). But if you correct for this the sound quality is at least as good as the Avant that I used to have.
Bieele