What kind of amp are you looking into getting? Those HCCA subs slam and still sound pretty good at the same time. Id recommend putting a xtr-pro 900 on each of them.
GET THE WIRES OUT THE WAY EITHER WAY.
YOU DO NEED AN BIGGER AMP, THOSE LOOK LIKE 1000+ SUBS EACH. GET BIGGER LOOKING AMP.HIDE THE NEON LIGHT UNDER IT. PUT THE CAP IN THE MIDDLE OF SUBS.
James, sack it up a notch and get rid of the damn neon crap... no one is going to see your neon light and say, "Damn, that light looks radical man!!!" They are gonna say, "Nice subs."
So cut the BS, hide the wires, get a decent amp, then sack it up.