I think we established in prior threads that you cannot turn off the bass management on the 5.1 inputs. The dreaded "double-bass" issue.

There are certain configuration where this is ok, like having small mains or no sub. With small mains, you probably don't even need the ICBM. With no sub, I believe you could use the ICBM to take the .1 channel and roll it into the mains. If you large mains and a sub, I doubt thr ICBM will be an improvement over the 950 since the 5.1 inputs on the 950 are not completely passive.