Eisenmann Exhaust I Would Like To Know What Is The Best Exhaust System For Mercedes Gl500 Which Has The Loudest & Deepest Sound?

I would like to know what is the best exhaust system for mercedes gl500 which has the loudest & deepest sound? - eisenmann exhaust

I like the sound Eisenmann much, but there is no exhaust system, the GL. What other (like Brabus Lorinser art, etc.) is the strongest?