Sorry I missed this post, atomicfission92.
Let me chime in my support & recommendation for the EV TourX line.
Don't hodge-podge your system with equipment that will require tons of processing and multiple amplifiers to make it sound....well sound half-way decent.
I was the first guy to own the TourX's. (I'm not gloating here, just hoping to give you a bit of help in making a large sound equipment decision.) My bread-n-butter is also school events, so I know from experience these bad boys will make the kiddos happy!
If you want a set of 15's and 18's that will absolutely ROCK any school event, dig a bit deeper into the pockets (not much though) and pull the trigger on the TourX's. You won't be disappointed. How could you be? No EQ! No Crossover! One, yes only ONE, amp. And, it weighs less than 18 pounds (CP3000s). How much more simplier can it get...run one channel for the tops, one for the subs. (Or, swing for another CP3000s and have a backup and seperate amps for each stack.)
If you want serious THUMP and SPL for you gigs, this combination will do it for you.
If you have any other questions, give me a shout. I love to talk about the TourX's.
http://www.electrovoice.com/productfamilies/98.html