Yes. AUDIO AUX LINK functions will also work with BV 5, 6, 7, 8, 9, 10... and other Masterlink equipped Beovisions.
You will need a Beolink converter 1611and a Masterlink cable. It converts Datalink (Audio Aux Link) to Masterlink.
If you get a Beovision with an inbuilt surround decoder, I`d connect all speakers to the Beovision and set BS2300 to A.OPT 0 and BV? to V.OPT 2.
In this mode your system will be controlled via the BV and you can get surround sound (DD , DTS).
Stefan