I'm looking into getting a cat back exhaust fior my Monte. I've been looking at the Borla Corsa and Magnaflow kits. People seem pretty happy with the Borla, mixed reviews about the Magnaflow and I've heard nothing about the Corsa kit. I'm looking for something that sounds nice is not defening and doesn't sound like a ricer. Anybody have any of these kits installed or know how they sound?