After working at circuit city i can tell you that the MTX subs sound *pretty* good but blow all the time (High and low end subs). If you get the MTX make sure you get the 3 year warranty because i guarantee you will be using it.
-Aubrey '93 Slicktop
Old car: '91 240sx SR20DET Best ET: 12.3 Best MPH: 121 http://pigseye.kennesaw.edu/~adb5499/1991%20Nissan%20240sx.htm