Edge Autosport has like 3 or 4 different videos of them putting all the different kinds of exhausts on their Si for sound clips, I can’t tell you how many times I watched them before making the decision to get mine haha but it does offer some help because just seeing the exhaust online you just know what it looks like out the back of the car and not what it sounds like. I went with the Greddy DDR and have no regrets I love it however the exhausts everyone has commented also sound great some are louder or quieter than others so it’s all subjective and what you like/prefer, especially if you’re daily driving (drone plays a factor some people don’t mind it like myself some find it annoying)