Hey guys, Long story short...circuit city and best buy don't know how to install a new hu to my stock system without bypassing my stock amp and sub. Nissan's rockford fosgate option is set up kinda weird, but I know it's possible to keep the amp and sub wired to a new hu with like a line level converter. Question: Any general tips on where else I could go for an install? I have no desire to attempt this myself . My brain would explode. My ride won't be pimpings withouts the Sirius in the head unit!