I am 90% music/10% movies. I currently own a M&K sub (claims it is flat to 20Hz, but after researching this, it sounds like, in reality, this claim isn't even close). WHich of the SVS subs would be best for me (not the ultra, too much $$). The room I have is 12'X16' (fairly small) and I used CDM7NT mains (full range, down to about 45 Hz). I am just wondering if the 20 is more for HT and the 25 for music, I have always thought that you want to get down to 20Hz (at minimum), but after learning that hardly any music goes that low (I am not a pipe organ listener), perhaps the 25 is better, or would i always be kicking myself for not buying a sub that goes down to 20Hz (btw, does the 25 go to 20Hz, but just roll off a few dBs??).