So I've been debating what area I wanted to improve next and for a while I was pretty set on sways/endlinks.. decided instead to pickup a Kicker BassStation Powered Sub and some deadening material to give the WRX some nice sounds for when I'm back and forth from work. Ran me under $500 for the whole setup. I started the front doors today and just with those two done the difference is very nice!
Wanted something easily removed if needed and this fit all the needs. Hope it will fit the way I want it to against the back seats.. haven't measured yet but if it doesn't I plan on facing them in a different way. I'll have some pics up probably later or tomorrow.