It amazing, with the system cranked you can stand right behind it and there is no rattling, vibrations or anything.

I cant believe how well it keeps the sound in the car. Of course you can hear it from outside. But the bass goes into the vx and for the most part stays in.

I have yet to push the system with the hatch open and though i am very tempted too and probly will soon , it was strongly advised not to.

Anyhow it is great, it takes a bit more space than what i like but i still have enough room to do groceries and whatnot, and if i had more $ and time id get into more goodies like you mentioned. Additional speakers, a cap, or even a monitor could sit back there w/little problems. My best mod yet - Well the ps2 is pretty neat also ....x