i have a 1987 325is, i want to put a cat-back system on it but i don't now which one, I saw the ansa system for like under $300 at bevarian auto, how does it sound?i like that one b/c of the price however it is not stainless steel, that is not to big of a problem i just don't want to have to replace it every 2 years, can any one recommend a system that is sub $500? also i really don't want to have it end up sonding like a ricer. thanks for any info