I have heard several AVs with the Magnaflow setup you are looking at and they sounded nice. Good quality system too.
It would be my choice if I couldn't get a Corsa. (FYI on Summit racing site the difference in price is $200 between the two brands.) I don't know if anyone sells them cheaper though.
I also don't know if those with the Magnaflow had any install issues or not, my guess would be no since that is a top name company. I do know the Corsa is a very easy install and can be done in about 30-45 minutes if you cut off the stock exhaust. I had a muffler shop install the Corsa on my 2004 and my 2008 and they said the Corsa was the easiest system they ever installed.