In my 98 SE Zetec I am currently running the following Boston Acoustics front and rear door speakers, for a head unit I have a Pioneer DEHP7200, i love this cd player, awesome displays like dolphins swimming around and an aerial view of an ancient city, well anyways in the trunk I got two Rockford Fosgate Punch XLC 12" subs. I got the 8 ohms because I didn't want my amp to get to hot(Rockford amps have a tendency to do that), the amp powering them is a Rockford 250a2. The subs are in a custom box me and my buddy made. We used some really dense 3/4" fiberboard that makes the bass nice and punchy. I am using all monster cables throughout including the $60 set of RCA's. I also have Dynamated the entire floor of the trunk with original Dynamat and the trunk lid with Extreme Dynamat!! SOUNDS AWESOME