I have an 2003 Nissan Altima with Bose Sound System and recently upgraded head unit to the Pioneer FHX700BT. I was wondering what some good subs are for a reasonable and affordable price are. I do not want Sony, Pioneer, or Kicker. Maybe some Treo, Alpine, Rockford Fosgate, or JL (or something else anyone may recommend). I need a whole set up (subs, amp,box,wiring) and maybe a bass knob would be nice. I was thing originally 2 10's, but was told by two car audio places to go with 2 12's. But I may just end up going with 1 12 for a few reasons, save trunk space, and I don't need a whole ton of bass. I really don't want to spend more then 400 total on the setup. I know that's not a lot at all and I did do research and know its expensive. Any suggestions/recommendations would be nice. Thanks.