In thinking it over some more (shower time) it may make most sense to do the SMS-1 first, then once the levels, etc are set simply unplug the front inputs from the SMS (so the Audyssey isn't confused as to what exactly is my sub) and let Audyssey do its thing. It can't really override my SMS-1 EQ's so I may be worried about nothing. I'm still wondering what the mch stuff will do, though.