Okay, so a cubed box is a must, and a lip in front of the amp is the best way to hide it, gotchya. On the issue of facing it towards the seats being a bad idea altogether, I realize that I'm getting into some complicated stuff and might need to enlist the assistance of someone with more woodshop skills than me. How about sinking the sub into the box a bit? Make a large hole, and then put an MDF ring on the inside of that hole to mount the sub into. That way it could sink into the box and then I could simply cover some generic 10 or 12 inch speaker grille with carpet and lay it over the sub to get a flush, carpeted look. I know I'm sounding kinda unreasonably anal, but I want it to look like just a lump in the trunk if at all possible. Or is that a waste of energy and I midas well just turn it around to face the seat and it won't be so bad? Since the seat goes up and down the sub will be parallel to it pretty much no matter what if its facing them.