Well, I saw the install of Corsa systems on both Extreme LX make-over cars at LX & Beyond this past weekend. I can tell you from talking with the Corsa guys, seeing and hearing the product that it is one of the finest out there.
The question will come down to what do you want to hear. The Corsa is designed (and patented) to eliminate drone (whether caused by MDS kicking in - not an issue in your case - or just low frequency resonance) and purr like a kitten at all RPM ranges when you're just cruising along. But step on it, and you hear a loud, in-your-face, get-outta-my-way roar that is so knock-your-socks-off sweet.
Magnaflows sound great at idle. So do Zoomers. But for my money (eventually) Corsa will be the system on my MSRT8.