+1 on the smart wife!
FWIW, trapping works very well for stuff over 100Hz and this can still affect bass a lot. Since you can't move your M22s around, that corner trapping may help out with the null around 100Hz.
I spent a lot of hours looking for a solution to help with the sub 100Hz stuff including a studio design site, and its just not that easy.
Another thing you can try if you have nulls around the crossover area is to run the M22s full range and set your AVR to LFE + mains. This is what Earl Geddes does (his mains roll off at around 50Hz) to help fill in the mid bass. There are a couple of members here who do this as well and say they get good results.
If you are serious about tackling this, it is worth while to figure out REW. Its really not that bad once you get it set up.
