JL audio makes nice stuff. Your biggest problem may be finding an enclosure that has the air space to support a killer sub. W6 is a great sub, perfect to use as a single, but it requires alot of depth to mount, hard to keep that sub stealth without removing/adding custom panel in the back. As far as amps try and step up to digital, brand is entirely up to you/installer, digital amps are smaller and sound killer, and im pretty sure they draw fewer amps to produce the same wattage as traditional amps. More mula tho. Two 12"s in a sealed enclosure running 400 watts ea off a1200w peak rated 2ch amp will give you some nice beats at a low volume, and no distortion when you decide to crank it up. Sealed gives a tighter base, ported will give you low low "sloppy" base, if you ever listen to rock or classic rock, jazz, stuff like that id suggest a sealed enclosure, if all you want is real deep base and are not looking for the precussive sound go with a ported/bandpass box. Just set a limit of how much and stick to it, you can build a competition dmax engine for less than a competition stereo. Hahaha.