I'm VERY happy with my Sub-Solutions . Check them out
www.subsolutions.com/
I'm currently running their single truck series, but very shortly will be turning to their dual unit.
The nice part, it fits behind my rear seat of my 2001 crewcab, no modifications, just velcro to keep it from moving around.
I have nothing but compliments from everyone, but when I show them what's behind the seat, and they can't believe it.
I'll never go back to the 'old school.