i just sold my mac 2200 tube preamp and replaced it with halo parasound preamp .i lost the huge tube sound but i am getting to  tri-amp my system  i'm going to run a set of mini maggie  system with 2 bass panels  off the parasound integrated amp .these small speakers will allow me to adjust the soundstage , these little maggies sound similar to the 3.7 so i am going to fill a slight hole in my soundstage and make a 3 channel stereo setup ,. i am still going to run the 3.7 off the stratos monos and the crown digital mono amps runs the larger vmps subs. i should have the mini maggies next week , see posting when that happens .