Well in my opinion the brushed is a waste of $$ u can always just turn down the esc on the brushless, via the esc, or radio, so it will have the same low power as brushed, but the efficiency of brushless, and then when u get the crave to go faster(wich most certainly will happen quite fast) u can turn back up the power to the level u require and as far as a replacement for the mm I dont think u should, that is a very good combo as long as its maintained well