LEX4LIFE

I was checking to see if anyone has experience with jl sub systems and can give me some reviews. I'm thinking of getting a system for my Lexus GS400. I would like to get 2 jl 10w6 powered by a jl 1000/1. The dimensions of this box would fit nicely up against the back seat and still have most of the trunk space. Would this sealed enclosure preform well in in the GS trunk or Would I be better off having my local shop build a box to specs or just run with this pre-made enclosure. My local shop is recommending building a box and porting the enclosure through the back deck were the factory sub is. Any thoughts?

http://mobile.jlaudio.com/products_e...=6&prod_id=308