My suggestion is that you search and look for reviews/soundclips so you can decide what the best exhaust is for YOU. Everyone likes to plug the exhaust that they have on their own car as being the best, but the sound of an exhaust is very subjective from one person to another so do some research and come to your own conclusions.
For a start some of the more popular exhausts include Eisenmann, Bastuck, Borla, RD Sport, CP-E, Ultimate Racing, Autobahn Exotics, Rennart, and a few others that range in overall sound/drone/tone. Have fun deciding on what's right for you.
