imprezed2011wrx, nice build. I am seriously considering on doing this on my 2011 WRX. Question though... instead of using the lc6i and an amp, some people have recommended I use an Alpine MRX-V60 5 channel amp as it has the line converter integrated inside the amp already. Just trying to save cost. I would probably just use this to drive the 4 stock speakers for a while until I can save up enough scratch for the subwoofer install. Also, if I were to do the subwoofer install, would this MRX-V60 be enough to drive those woofers? Also, what is the cost for making a fiberglass enclosure like this (never worked with fiberglass myself) or to have someone do it for me? Again, nice build!!