I alsio went the route of a GT500 exhaust. The pipe that connects the muffler to the "over the axle" tube will need to be cut from your existing V6 pipes and welded to the GT500's that you buy (unless there's an aftermarket that sells them for a V6). Any muffler shop can do this; it cost me $80.00, and they even did the install after the welding. Shop around for them. I paid $150.00, used. Here's a pic of the weld I'm refering to, and a shot of them installed. A sound clip is really useless. You need to hear them first hand on a V6. They are great; not loud, great idle.
It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.