Best exhaust for the Spyder

I have not heard them all, but I do like the sound of the optional Hindle, raspy W/O being overly loud. "Sounds good" is such a "personal" thing. I've had really loud and awesome sounding exhausts on some of my cars, but they only sound good for so long before they became annoying to me. So I tend toward mufflers that let the engine "show its stuff" under acceleration or hard down shifts, but are quiet and not "droaning" or "buzzy" at cruising RPM's.