Hi losi_phile!
av_phile very well explained the comparative performance of each sub. I am more inclined to listening to music that is why i favor using the acoustic suspension type (aka sealed) of sub, no distortion even at higher volume, real bass sound, controllable LFE, and does not produce "ugong".
i like the likes of Sunfire True Subwoofer, B&W ASW600, Atlantic Technology, and MK, the kind of real bass i am looking for.
Thanks.