The pioneer 12" shallow mount is a very hard hitting sub. It hits the lows very well. I have a prebuilt one (Click me). It was an amazing first sub but I wanted duals lol so I got 2 type rs. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
The JL's were impressive, but for the $$ the Memphis is way better hands down. In all actuality I think they'd be on par w/each other. So my that's why I would choose Memphis over JL.
That and JL's a bit over priced anyway. Good stuff, don't get me wrong, just too pricey. IMO