Step up to the hds' s. You will not be disappointed at all man. I'm running 2 10's and they are beastly. As far as size, how much room do you have for the right box?I am thinking about buying some soundqubed hds210s or hds212s i am undecided whether I should get the 10s or 12s. I hear good reviews about these. Are they worth it? I am currently running 2 lanzar max 12s on a brx 1700 amp.
Did you hook up that ba already?you may be better off getting the 8" if your going with 2 .my mother has a 09 cobalt and if you go with 2 12" subs you will have no truck left. if thats ok with you go for it.
bit ya soundqbed all the way. im running a hdc3 15" sub and getting another one soon. great subs for the money.
My buddy has a cobalt with 2 zv3 15s so a pair of 12s is no problemI have a cobalt so don't have much trunk space but can probably make it fit.. I know nothing about building boxes though.