why not get a generic one and put a jl logo on it?

if you're mostly doing this for show then all those subs is fine, if you want it to sound good, chances are you'll be running into cancellation probs w/ subs all over the place like that

even w/ one sub you're gonna get rattling, i suggest you take out those rear panels and do a LOT Oof sounddamping.

there's a vent to the passenger side corner, make sure you take care of that, it flaps and makes hella noise

javi d
vroom n' boom