reread my post.. I edited it, lol.
edit:
Hmm, if you weren't strapped for buying from BEst Buy, I'd sell you mybox, with two 10" kenwoods and 600 watt amp for pretty cheap.
But we won't turn this into a classsified's add page, lol.
Now, bestbuy is including a pair of Dual subs with that amp if you want to use them, thats fine, they suck, but will produce bass nonetheless. You'll just want to be sure to get a monoblock amp or a 2 channel amp to power those two subs. You'll probably want to condier a cap (thinking about it now) since you will be having two amps drawing off your one car battery.