i have the apexi world sport 2. sounds good. quit to WOT and even then not to loud. at idle pretty much sounds stock. never gotten a ticket, and i live in great bridge. cops haven't messed with here or va beach.
also you could keep it stock computer. you tune it, it could help you somewhat just due to more airflow and things. but it won't be a 40whp gain lol. if you get what i am saying. if you want to tune i'd do little more then that