dual Flowmasters sound pretty good. 40s are loud, so if you want quiet look at the 50 series. It really does depend on the person and what they like, because you will always hear good and bad about all of them due to the different sounds. If you don't want to mess with an H-pipe, Mac makes a direct bolt on, but it wont give much if any power gains. Personally I like dual Flow 50s on an H pipe because it is mellow, deep, and got a good rumble at idle. H-pipe has a more mellow sound, X-pipe is louder, but for the 3.8 even fire, an H or X are not needed, they only tune the sound of the exhaust slightly. Off road H/X pipes (no cats) might make it raspy, and louder, but many shops will not install them, and if they do you have to have cash.