... except we don't know what console the OP is using, so the thought "I am not worrying about getting speakers with a built-in crossover because I have a digital console" is worrisome. Even more so when the OP first said he would "work the crossover and EQ it."
That being said, he's only asking about sub choice and not commentary on the system setup and design, so maybe I need to shutttup. 
-Ray
The console is a GLD80, so yes no native crossover (as Scott pointed out), but the console is also running Waves Soundgrid. And not wrong to call me out I gave very little information (which was dubious), to be honest, this little rig is only for an auxiliary room and in the grand scheme of the event is quite small, bigger fish to fry :-) I will make sure it sounds good, but attentions are elsewhere.
Do those JBL boxes have a high pass filter?
The SRX's offer a fair amount of processing, if I remember right, it has 20 bands which can be setup either as parametric or a crossover? Someone correct if this number is way off.
