Many different options:

Magnaflow: Quiet at idle, loud when on the gas
Flowmaster: What I have, loud all of the time; great tone
Blastin Bobs: Loud on the throttle
Borla: Fairly quiet
Corsa: Load when on the throttle

All of these are choices. Remember, taking the rear resonators off or not will make a big difference in how loud and how aftermarket mufflers will sound. The large suitcase muffler up front is what will be replaced, if aftermarket mufflers are chosen.

For now, you may just want to remove the resos and see how it sounds. Again, they are the two canisters in the rear of the car.

-Justin