whats up! im new here, and its great to find a place where i can come get advise on my is. Im wondering what kind of exhaust is good for the is. I want good sound from it, but i dont want a damn bumble bee! i want a full system, and im not sure which one to get. Im thinkin about the HKS carbon ti, or the Greddy evo any thoughts? also, what are some good ways to really improve the performace of my is? thanks!