I'm looking at 2 possibilities for 2-LE12s. One is a bandpass box with .94 cu feet in each ported chamber and 1.84 cu feet shared in the sealed area. Like this: http://www.crutchfield.com/cgi-bin/S-i1rboGsHRAE/ProdView.asp?a=0&s=0&g=65700&id=detailed_info&i=04412BP4

Or I could get a ported box like this: http://www.crutchfield.com/cgi-bin/S-i1rboGsHRAE/ProdView.asp?a=0&s=0&g=842&id=detailed_info&i=044H1712DX
This one has 1.75 cu feet per woofer. Or do I need more space? I know that I don't understand boxes enough to make my own. Any help is greatly appreciated. Music tastes range all over from country to rap to acoustic guitar, but I love big bass.

Edit: I plan on running 450-600 watts RMS at 2 ohm.

'98 SVT KKM / TH fix / Mobil 1 / Synth tranny cocktail / JVC LX-30 HU / 10 JL sub / Alpine V12 amp / Panther 199 wheels / Kuhmo Ecsta 215/45/17 / Bosch +4 / Ford Motorsport wires