I have a 1998 se model with 2 crappy door speakers, that's it. I already put in a head unit, and I'm gonna upgrade the door speakers, but I want rear speakers and I'm wondering where to put them, and if the factory harness includes the wiring for more speakers. I have the hatch panel off rough now because the latch was stuck, and it looks like there's enough space for speakers, or should I spend the money and get a soundbar?