I currently have the n55 mid pipe, and while that did change the sound enough for me to notice a difference. I am now looking for more... I want that touring car sound, that raw power sound. I know if I change my current setup, the only other one I would truly be happy with is the Akra Evo .There is no other allowed option except what I have now. I feel that the Akra and the 1M go hand and hand. Although I did acquire an n55 midpipe I am not one for mixing and matching of brands/ sections. I did I find a few used Evo systems @ some rather fair prices. But those of you who are out there, and have been through this already, and have made moves/ changes please do tell your tales and share the routes you took! I know there are at least of few of you out there that can relate