OK guys, i need your help. My g/f is already buggin me for xmas ideas so I'm asking her for a new 12" sub to replace my old dual 10 inch MTX Black Golds. I need a sub thats gonna hit hard and fast since I listen to heavy metal music. The price range she is giving me is $175-$250 and it will be powered by a Kicker ZX1000.1 amp. What are your suggestions? Thanks!