Ive been looking to upgrade my system for a while to something louder and cleaner and have been looking mainly at JLs. I recently found W6W12s on sale on sonicelectronix for around $400. From what I read these are the subs I'm looking for but I still have a few questions. Right now I'm running a 15" Eclipse titanium in a ported box on a Hifonics Zeus 1200 watt amplifier in a 2001 Expedition. Would 2 W6s be louder than this? I'm looking for something that will really hit hard, like a lot harder than the eclipse. Will the amp I have work for two of these subs? Also would I be better off going for 1 W7? Lastly, would it be necessary to make improvements to the wiring setup I have or the alternator or do any other sorta major additions to my system to accommodate these subs?