My lint in order...
1) SI Mag (obvously I am partial due to owning this woofer)
2) ID Max or ID Q (both are great subs, the max will be a much better sub for what you are after, but the Q will be a great budget sub in this class)
3) Alpine type X
4) MK-2 Adire Brahma
5) Adire Shiva (if you can find one. They dont look like much, but they sound amazing)
6) Arc audio flatline series (I think that is what they are called, sound great from the several installs I have played with/heard)
7) old school solo baric subs by kicker ( //content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif )
8) Old school PPI flat cones
9) JBL GTI subs (another //content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif )
If I think of more I will post them.