i have 2 gravity warzone-x 2500 watt 12" subs and a 4000 watt amp the are going in a 1998 honda accord 2 door should i put a sealed or ported box i want it to sound good i have been to 2 stereo shops and 1 says ported and one says sealed i dont want it to sound like crap will a sealed box hurt these speakers or hold them back will a ported box sound bad and what is recomended for these speakers