I guess you a SKAR VVX 12 dual 2 if you want save some bucks a B-stock http://www.stevemeadedesigns.com/board/topic/124310-b-stock-skar-inventory-for-sale/, a Soundcubed (before Aduioque) 750 http://www.audioque.com/AQ750-Amplifier_p_46.html, a batt from him http://www.stevemeadedesigns.com/board/topic/139495-huge-brand-new-shuriken-battery-blowout-sale/, this Stinger is nice as well
http://www.ebay.com/itm/Stinger-SPV70-70-AH-Car-Battery-1050-Amp-2100Watts-Yellow-Top-2010-Low-Use-/120876838759?pt=LH_DefaultDomain_0&hash=item1c24d22f67, longer ago Nathan from XS-Power staated that only Stinger and XS-batt´s are compareble and a Ampkit http://www.ebay.com/itm/0-1-0-Gauge-Single-Amp-COMPLETE-installation-kit-RCA-speaker-250-amp-anl-Fuse-/230754267822?pt=LH_DefaultDomain_0&hash=item35ba06b2ae. That´s arround 600 $ so you have a restamount of your budget for MDF and
smallpart´s.
PS Sonicelectronix have the Singerbatt as well for 70 $ under other offer´s, but i didnt took a look at the shipping of the other offers.
http://www.ebay.com/itm/Stinger-SPV70-SPV-70-1050-Amp-70-AH-Car-Battery-Dry-Power-Cell-/360453268994?pt=LH_DefaultDomain_0&hash=item53ecb06602