I'm in the same boat, KF. I want to add an 8 or a 10 in my X. I had two 12s in my Monte, but I want the cargo space of the X, that's why I got it. I have two amps, a PPI-PCX440 and a kenwood KAC-923 to power my whole system. I just checked the parts dept at the local nissan dealership. The cargo area's body moldings are about $100/each, FYI. As for the JL Stealth box, it kicks ass I'm sure, but it's $$$$ and, if you're like me and fold the seats down ALOT, you lose all that cargo room. For me, that's not exceptable