Get the offroad H-pipe first and see how you like it before you bother blowing money on Loudmouths or anything else. This is not to say that you wouldn't like the Loudmouths or another cat-back better, but the H-pipe is going to make a huge difference. Once you have the H you might be content with the Flowmasters. This is the setup I have and since my insurance is on hold for the winter I have only been to the end of my driveway and back
. My impression so far is that it is stupid loud at startup but quiets right down after a few seconds. With the top down I think it will be plenty loud but not so sure if I had a coupe. Then again I might be getting to the point here that the law may start paying a little more attention to me and Loudmouths I'm sure would only make that worse I guess.