hey guys new to the board and need some help!!! I and need some advice on 3 8's. I currently own a 2004 e46 m3 convertible so have very lil room to play w/. i already have 3 8w3v3 but they sound like crap in my small box (d=9 1/2" l=27" w=10 1/2) off a 500/1 amp. Wanting to upgrade to something...