My best advice is to find someone locally and listen to their setup. The clips are ok, the feedback and reviews are helpful, but as you'll soon find many people have different tastes.
Each Cat-back will produce it's own unique sound. From Borla, Dynos, Flows, Bassani to MACs, etc... believe me, you'll be much happier once you've heard them in person before deciding on which to go with.
Of course, I'm a little bias and I would tell you to go with the Borlas. But again IMO, you'll want to hear a few in person before making your decision.
Good Luck w/your search.