I live out here in AZ and there is a member on here named TAZZ that has the Official Magnaflow Exhaust for our car. It is not too loud. In fact, you can only really tell there is an exhaust on it when he steps on the gas all the way. In real time driving conditions, it is not that loud, but it is very nice.

Not sure about the Borla, never heard one in person, but I would not throw out the idea of the Magnaflow Set.