JL 12w7 or Adire Brahma 12?

I feel both are the best SQL subs on the market.  The W7 uses all custom parts, which gives it it's higher cost.  The SQ of both subs should be pretty much identical since both utilize different techniquest to obtain the lowest distortion possible; better than the standard topologies found in the competition.  Their output should be very similar as well.  The W7 does unload a little more gracefully at the extremes.  But this is a benifit I don't suggest you experience.

The W7 requires a larger enclosure, but will probably be a little more efficient.  I have heard that the Brahma is a little more robust in the lower frequencies than the W7.  I always thought the W7 was the better looking of the two, but with the changes made in the Brahma Mark II, I think that has changed.  The Brahma definitely has the best warranty with 3 years, while I think JL only offers like a year.  But then that is a great price for a W7.  That definitely leveled the playing field between the two. 

I still think the Brahma may be the best way to go for you since it costs a little less, and requires a smaller enclosure.  And BTW, if you buy it from an online dealer they usually offer free shipping.  Here's a couple friends of mine that are online dealers:

http://sound-foundations.us/catalog/default.php

http://www.visionaryaudio.com/

Of course if you have a local dealer near you, then definitely go there.  You can check this in Adire's dealer location page.