OK, well, I am going to tell you what I would recommend...
Sub: One Adire audio 12" Brahma or 2 Adire audio Shivas
http://www.adireaudio.com/mobile_aud...hma_series.htm http://www.adireaudio.com/mobile_aud...vers/shiva.htm
Amp for Sub/Subs: JBL BP1200.1
http://www.ikesound.com/product-product_id/209
Reciever: Alpine CDA-9813 (Plays MP3's, very very nice to have, fit like 150+ songs on one disk)
http://www.ikesound.com/product-product_id/1301
Comp. Speakers: Infiniti Kappa Perfect or Infinity Reference (Little cheaper, still very nice)
http://www.ikesound.com/category-category_id/139
Amp for Comp: Clarion APX401.4
http://www.thezeb.com/caraudio/clarion_amplifiers.html
Well, Thats my opinion...