The two most popular that we carry are the MRT v2 and Borla axle back. Both are within the price range you mentioned and sound great. They are louder than stock but not obnoxious and have a much deeper tone. Below is a video we filmed a while back of the Borla and we will be filming a MRT v2 video this weekend. If you have any questions feel free to hit me up or give us a call at the number in my signature.