We had a similar issue when looking at upgrading our BV10.
We took the Theatre route as at the time it integrated with the other speakers we have without the need of extra boxes etc. We have BL5’s and BL8000’s attached to the Theatre which works extremely well. We have the Theatre and Tv mounted on a BV 7 double pole stand as we prefer the look. The motor on the stand doesn't function but we didn’t use the motorised stand that much before anyway. The tv is 55”.
I suppose you need to think about what you want to achieve. Full integration like you have now or a bit of making do with a few less functions? What do you watch on Tv? Is it free to air, DVD’s or streaming? Do you listen to music etc? CD’s, Spotify etc? Do you listen in other rooms too?
There’s endless possibilities but I suppose it’s a matter of getting it working seamlessly and playing well together.
Peter