I went to the local Paradigm dealer today and listened to Studio 20s & 40s paired with the M&K MX70B. The dealer was recommending that I go with the M&K rather than the Paradigm PW 2220 or Servo 15 given that the room is 16 x 14 x 8. He felt that the larger Paradigm subs would be overkill given the room size. I really liked the way that the M&K MX70B blended with the Studio 20s & 40s. I am leaning toward Studio 20s, the Studio CC, & Studio ADPs. However, I have been somewhat concerned about fitting the 2220 & Servo15 into our already crowded living room. How important is it for the sub to be made by the same company as the rest of the speaker system? Is there a cheaper sub out there that will work as well as the M&K 70BX and that is about the same size as the 70BX? The dealer had the 70BX listed at $1050.