Did you looked over the SKAR offers, B-stock, box with sub´s. Think there stronger for your goal groundpounding than the E-series from Sundown.
As amp the new APSM 1500 http://www.ebay.com/...=item41640b35ed.
Example sub-box offer http://www.stevemead...-37999-shipped/ + AP amp +
0 gauge ampkit http://www.ebay.com/...30e87e0&vxp=mtr + a vew bucks for 0 gauge Big 3 (im sure someone will sell you a vew feet´s used here, or shoot a mail to the firm of the ampoffer if they have a vew feet´s 0 gauge extra to sell + a fuseholder, together 550-570 $.
PS here is another offer of the APSM, the other offer i didnt saw a bassknob or you have to ask.
http://www.ebay.com/...=item519e4dd5b1
PPS. sorry this post is over the top threw the titel of the thread. Idk how i came from have a look after a cheap batt,
to redsign your system idea, sorry.