get an alpine type r. i hear those are some badass subs. great sq. get pretty damn loud too. i don't have one. (i have a jl 13w7) but you can go wrong with the type r. go for it man. i'm sure you'll hardly be dissappointed with it.
the L7's can get loud but not as good of sq. either way you can't really go wrong but i vote type r.