Hey everyone i new to the fourm i have been into stereo for 6 years now i have a 85 k5 blazer im gonna clean up and make nice but i want a big stereo i want to put 2 18s but im want sql im stuck between dc xl or fi sp4 fully loaded they are both awesome woofers but and 2 aq 2200 unless you think i should eun differnt amps im gonna put a 200 amp alternator and 3 or 4 xs batteries in the back give me your thoughts and ideas please abd thank you