I could be more than a year late in answering positively to your question but here it if you are still interested.
I bought a Loewe Individual 46'' 3D TV
and successfully integrated it with the rest of my B&O set up.
In this set-up the speakers used to connect to Avant is now connected to the Loewe TV set. So does Ouverture gets connected to the Loewe too.
As for Ouverture on one floor, Avant is the basement and BeoLab2000 on the 2nd floor keep on working on the MasterLink connection so that we could listen to music through Ouverture where we want it.
Rather long, so attach a link rather than the text itself. Hope you may find it useful.
http://dl.dropbox.com/u/36715224/Loewe%20Individual%20TV%20with%20B%26O%20Speakers.pdf
Regards,