Yay a new jl audio man. Jump on the band wagon. How much did you pay for it all? :-p jp nice first system. My first was an 8" Swiss audio and 150 watt lightning audio

As for what u need now, Id go for after market HU, and maybe a battery upgrade. I bet that stock civic battery isnt going to like the stress that amp will put on it. Might also want to look into getting some new high speakers and maybe an amp for those cuz it looks like the bass/rattle is going to drown out the highs. Also look into some sound deadner cuz ur civic is going to do a lot of rattling and vibrating. Ull see what I mean the sub hits and ur trunk rattles like two midgets wrestling in the back