im looking to spend around 500 for a catback exhaust i want the most horsepower that i can get. I was looking at DC sport, Greddy and Thermal. They have many in my price range but this is the first time i will be purchasing an exhaust and im not sure what is the best one to get. Like i said before i want a deep throaty sound, horsepower and for it to not be very big like the Apex I N1.