best overall sub

No sh*t, I was thinking the same thing.  Don’t we go through this twice a week?

Your asking for recommendations for subwoofers that cost 600 + ?   From people you don’t know?  Ok I'll give you my opinion: JL 12w7.  Now, get ready to drop a grand on a quality amp to go with it.  Then again if I had that kind of money to spend on a car audio system I would want to do several evaluations myself.

And when you decide, after spending 1700 on that w7 and JL 1/1000 (or whatever you choose) make sure you don’t use plywood that has been sitting around your backyard for 3 years, make the box to fit the car and not the box to fit the subwoofer, skip out on the glue cause it makes a mess, use 3/4" screws to secure the 5/8 plywood, drill a hole in the back to get the 18 gauge wire in, use a old Pringles can to make a port (cause ported is louder!), use tape to stop air leaks.....   I'm saying that no matter how much you spend on a subwoofer, it will not sound any better then a walmart Roadmaster without a solid, well built and conceived enclosure.

Here is a page were you can find professional reviews: http://www.caraudiomag.com/testreports/ .  There are many good subwoofers out there and I could hardly give you five without leaving out five other great speakers.  So, my five will not be the same as someone else’s, but that does not make their list invalid or incomplete.

"I'll give you .10 and say that w/ a JL 1000/1 or other highquality proven amp."

I don’t understand that bud, the .10 part in particular.  Yeah id want a 13w7, but they want 200$ more for one of those then a 12w7 around here.  I cannot imagine that the 13 is much louder then the 12, so id choose the 12.  But if i had that kind of cash lying around to spend on a sub i would probably not care about the extra 30% for the 13.