If your pre/pro and ICBM both have full bass management, what is the point of the ICBM in the system? Is there something else you need it for?
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In your setup, you need bass management for SACD/DVD-A from the ICBM and for DD/DTS/CD from the 950 (unless the 950 redigitizes the analog inputs and applies BM). You should set them to similar settings.
If the 950 redigitizes the analog inputs, you do not need the ICBM.
Another possibility is to put the ICBM between the 950 and the power amp so that it handles the BM for all sources. In this case, set the 950 for no BM (all large).