Kevin, Rockford Fosgate subs are good. They are one of the more 'quality' subwoofer manufactures out there. I am a big Fosgate fan. I would highly recomend them. If you go with the better subs that have alot of power handleing or the new P2's then you would have a very good chance aganst some JL's. Personaly i think JL is the best and kicker is goos too. But Rockford is still up there. And if you go with MTX well there is no compitition. MTX is worthless.
my thoughts are about the same as patricks i have been checking out fosgate sence about 93 and well one thing for sure is they havnt been trying as hard as they use to i dont know if i would compiet them against a jl though
fosgates are alright. i'd rate them up there with others. i had 2 15's he2 subs and they bumped pretty good. they're pretty loud and don't sound as good in sq. other than that, i wouldn't mind buying fosgates again.