Im going with MB Quart because I dont see it very often.
049RAA1000 MB Quart Reference RAA1000 Car Amplifier 049RAA4200 MB Quart Reference RAA4200 Car Amplifier 049PWE304 MB Quart PWE 304 12" 4-ohm Component Subwoofer
Now what mids should I run? What Cap?

 

I know you do your own custom work you should try a 3way component set & make custom kick panels or mold them in to the doors look at Dynaudio, Morel, CDT, Focal