Another benefit of having the HK system, assuming it ships w/ the same amp in the F80/82/83, is that you can code alternate DSP (representing itself as B&O "Expanded") which, by nearly all accounts (on the boards and in person w/ my customers) significantly improves SQ.
Info's in this thread:
http://f80.bimmerpost.com/forums/sho....php?t=1322442