How an exhaust system sounds is very subjective, what sounds good to me may make your ears bleed or vice versa. Personally I've always enjoyed offerings from
Magnaflow. If you check out AmericanMuscle, CJ Pony Parts or LateModelRestoration websites you should be able to hear countless numbers of sound clips for the exact mufflers you are looking at designed to bolt up to your car. Stick to a bolt on axle back kit and do this yourself in the driveway IMHO