Fastest subwoofer?


Hello, I would like to buy a subwoofer that complements a pair of very fast speakers. I know very little about subs since I rarely used them, and I am wondering what are the models that are considered to be extremely fast and good, no matter at what price point. Thanks.
ggavetti
I have electrostatic speakers and my JL Audio F110 sub has no problem keeping up with them. They also have good detail and are easy to set up.
very interesting suggestions...does anyone know paradigm millennia? i heard good things about it but i am concerned that in order to make it so cool-looking, they gave up some quality. thanks.