For what its worth, i will put my two cents in.
I swapped out my factory fronts and rears with JLAudio, used a Audio Control audio processor to run an Alpine MRP300 for the front and rear JLAudio 6.5 components and the 6x9 rears, an Alpine MRP1000 monoblock running a single
Alpine Type-R 12 sub and it ROCKS... the LC7 audio processor allows you to remotely control the output of the sub pre-amp so you blend it nicely with the rest of your system. it also has a push button action on that control knob that allows you to switch between the stock head unit input and auxillary. I have my IPhone running into it for MP3 use (stock deck sucks). you could run a game system, DVD unit, computer ect. to it though and it is all nicely adjustable.
the beauty of the LC7 is that you can adjust the level output on each channel to match things perfectly, PLUS it outputs at 4v preamp level so your amps can ROCK!
On a side note, anybody who is running thier amp bolted to the bottom of the rear deck needs to be careful if its a high power amp... that is a great spot IF you add some 12v fans to cool the amp... heat rises, and that's the top of the trunk... just saying....
If you pull out the back of the back seat, you can sandwich a piece of pegboard (inside, next to foam) with a piece of 1/4 carpeted plywood on the outside (of the steel wire backing on seat) and give yourself a perfect place to mount amps, crossovers, caps, etc. where they wont heat up nearly as much as if they are up top. Plus is looks kick ass!