first you need to determine what airspace your subs need. the amount will differ for a ported box and a sealed box. next measure what space you have to work with then use a box calculator to find out how big your box will have to be. but if you do ported you have to figure in port volume. and you also have to think of woofer displacement http://www.rockfordfosgate.com/rftech/box_wizard.asp. as for the 10's amazon crutchfield or search the sale threads on here
I heard that ported sounds better, but every car sounds different..
backwards. sealed has better sq whereas ported is louder.
Well I don't want to kill my car with just all bass and no actual music.
true i think sealed would be the way to go then