Hi Liviu,
I tested and ordered a Beolab 11 last week. I will use it in a surround sound setup with Beovision 10-46 as center, front Beolab 6000 and rear Beolab 4000.
Beforehand, I tried a Teufel sub which was between BL 11 and BL 2. It was very well performing, but it was simply too much bass for us (and I don´t need to mention the "different" design 🙁). So I tried the BL 11 and it suits very well in the set-up, without dominating. Since our house is Master Linked all over, I run all speakers through the sound management of the BV 10-46 which would be the analog steering unit to your BS 3. I guess the advantage would be that you will be able to set-up and steer the relation of the speakers between each other using the BS 3 menu. I don´t know if this will be possible if connecting the BL 8000 with the BL 11 instead.
One last thing: My dealer told me to use the BL 2, because he perceives the BL 11 too weak for real bass effects. He offered at the same time to test the BL 11 in my home up front ordering it.
I guess that our ways of hearing music and watching TV are close together, not needing crashs too loud in a movie. So I think you probably will like the BL 11 more. But if you have the possibility to test it before buying, you should take the opportunity and test it.
Kind regards,
Rolf