Yaris Sedan Deadening and Sound system upgrade

[derickveliz2]

After some reading I realize that using an active crossover is the way to go, I'm heading a little bit towards sound quality here, and by doing so I think I'm going to loose my rear speakers, (this is for a good staging, I assume).

I'm OPEN to any suggestions here, this is my plan, if you feel like suggesting a better way or proper way my ears are wide open, I'm here to learn and to accomplish as much as possible, there are some variables like things that I already have, but the more input we get the better.

Thank you,

D.