Clarion 12" with Clarion 500w amp. Clarion is pretty unknown to most people but they are quality speakers. I love mine. Go with a closed enclosure unless being obnoxiously loud is your main goal. A sealed 12" gets plenty loud in a hatchback, and if you roll the windows down everybody can still hear you from blocks away (if you turn it up). Sealed enclosures give the bass really nice response and 'tightness' a ported enclosure cannot do, but they will never be as loud as a properly tuned ported enclosure. If rattling windows is what u wanna do, then go ported :23:
My 5 cents, enjoy your bassssss