Magnepan 20.7 + Pair of Vandersteen Sub 3 + AR Ref6

Some feedback on adding a pair of Sub 3’s + M5HP crossovers (waiting for H7’s) + AR REF6 added to Magnepan 20.7 system. Well its just fantastic. And my dealer has not room corrected/phased yet and its still fantastic. Much, much more depth and punch. I am hearing low octave things I have never heard before. I am now feeling the punch/bass that only big box speakers seem to have. Have no issue with the crossover integration, its seamless to me. I cannot fathom how I could improve the system further without spending insane money (spent enough already), this has been a huge step forward.