im ready to upgrade i currently have two kicker 12 inch cvrs in the prefab box and a zx1000.1 running them i was thinking about getting a 18 inch q or bl or two 15's for some reason i haven't been able to see the specs or the price on the bl on my computer so i dont about it. my buget is about $400-$500 dollars and it will be going into a 96 grand marquis ive got 40x30x18" in the trunk and a big opening id just like to be louder and i quess sound good so any help would be greatly apprieciated