i have a 98"GMC ext truck that im going to wall off soon. i was wondering what set up would be better. 2 SSA Zcon 18s 2250w rms each= 4500w rms 4 SSA Icon 15s 1250w rms each= 5000w rms i have room to build either set up and lets assume i have the alt, amps n batts to push it..