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looks like a pretty nice setup to me. as for the amps, sonic should be able to tell which one to get. i agree, two amps, one just for the subwoofer and the other for the speakers. im running three, one for front door speakers, one for rear speakers, both same type of amp, and one for the subwoofer. i have the jbl subwoofers and thought about there speakers but have read a lot about Boston A, i beleive there the se55, something like that. check on ebay, you can get the stuff for almost half the price.
I like my Kicker amps. Had Kicker in the doors, but just switched to Infinity. If you run close to 1,000 watts RMS, you should get a capacitor. Otherwise, once the amps are in, crank it up and if you notice the headlights dim with power surges, this means you need a cap.
my friend is a JBL distributor nice pic but I would stay away from there sub. as far as amp the JBL sub 1500rms amp is nice and then get the JBL 600x4 amp