Based on several of your other threads and having a general feel what you have from responding to them -as well as your siggy...
The BS1 setup you have trying to run some passives -I seem to recall your having a single BL4000 as center, RL6000 as fronts and S45-2 as rears running on MCL2P's w/ a non B&o panel.
Trying to incorporate a BM5000.
Here is what I would do in your shoes...
A.) BM5000: Use it just as an independent audio source. It is a great amp, arguably the best of the stacks. You have a great set of speakers in the S45-2
1.) Get an MCP5000 and/or a T5000, connect the S45 and do nothing else except perhaps pick up a CD50.
2.) Enjoy.
B.) BS1: If you are not intending to buy a BV4 -sell it.
1.) If you don't want a BS3 -buy the Onkyo or similar from the other thread.
2.) Buy a pair of (center) matching BL4000 for the fronts.
3.) Leave the rear MCL2P in place and connect either of the remaining RL's or even the CX50.
4.) Enjoy.