I just ordered a 15" Atlas the other day and I need to decide on a box for it. I will be giving the atlas 325 watts rms. I listen to rap most of the time and then some rock. I want some good spl but some good sq too. This is going in my Ford Ranger Extended Cab so there is plenty of room. My max diminsions are 40Lx20Hx12D. What kind of box would you suggest.