Best E63 AMG exhaust? RESONATOR DELETE or X Pipe or RENNtech HEADERS or LONG HEADERS #mercedesamg

What's the best exhaust modification for w211 E63 AMG? Which setup should you get? Resonator delete vs X pipe vs Renntech short Headers and Eurocharged tune? Local members of the W211 E63 community with various exhaust system got together and compared. Which one do you like the most?