I'll play.
I'd say the "industry leader" overall, is as much JL Audio as any other outfit.
Their smaller form factor "f" series subs are about as accredited as you can get (although they're not cheap) and their larger units like the Gotham "seem" to offer output and performance that are all but without peer. Never mind the fact that they're gorgeous...but again, anything but cheap.
I realize other manu's also have very capable units, great sales, and a solid reputation...Paradigm and Velodyne come to mind.
James