Sorry to necro an older thread, but I wanted to add some comments since I purchased a subwoofer. I found a relatively inexpensive Paradigm subwoofer that had good reviews off Craigslist, because I wanted to test the effect of a subwoofer before I took a plunge on a more expensive subwoofer. In a word - wow. The mini maggie is greatly enhanced by filling in the bass hole. To the point that I think for most music types, it's disingenuous to say that 'some people may not feel the need for a sub'. While technically true, I don't think anyone hearing a properly dialed in MM + DWM + Sub combo with a good sub would prefer it without the sub.
The tricky part is integration, but even without achieving absolute perfection, having the sub present helps a lot. I think a really fast, low distortion sub (in the 4 figures $-wise) would sound even better, because I can easily tell the difference between the DWM and the sub, but like I said, turning off the sub makes the sound much more brittle and lightweight. I used some calibration discs and a sound meter to get a rough idea of the updated in-room frequency response, and despite a slight dip in the mid bass due the the 200hz handoff to the subs, it is suprisingly smooth (better than my professionally calibrated living room). I now find the treble and overall balance perfect. These really do sound like a much more expensive set of speakers now, and not easily put to shame by the high end headphones sitting next to them. Highly recommended.
