I'm driving an Infiniti M35X. I've already installed an injen high flow air intake. I now would like to move on to the exhaust system and install some type of cat back unit. Here is my problem. I need to try to install a system the is pretty much "stock" quiet around town and on the highway. But, I would like it to sound more authoritative when I add throttle input. If I don't get this right my wife is going to skin me! I just don't want to be driving around town like some of these kids in their Honda Civics and have my car sounding like a fart on steroids. Would a Borla, Megan, Stillen or any other high flow exhaust meet these requirements or am I asking too much? I want the additional performance, just not a lot of noise at idle and lower RPM's. Thanks in advance for your advice, tips and suggestions.
Ted