Update: 10/19/2012. I installed a GReddy Evo3 Cat-back exhaust on the car that I bought off a member here. Previous owner had only put around 500 miles on it, so it's practically brand new almost. What can I say? I love this exhaust! I'm one of those guys who loves a loud exhaust, which is way I will not be using the silencers. Also one of the complaints people have with this exhaust is the 'drone' inside the cabin. I'm actually not bothered by it surprisingly, although it causes my spin turn knob to rattle because it's so loud, lol. It does feel like it's a bit faster then before. Definitely in the first few gears, maybe not so much in 5th and 6th though. It's pretty quite after you hit 5000rpms also. Fitment is great, easy to install and fills the exhaust gap space pretty nice. As you've read earlier in my journal I had the DC sports tips, while they looked good over stock, they weren't cutting it for me and I did want an aftermarket exhaust for a while.
Here are a couple of pics of the exhaust installed and a sound clip for those who are interested.
And finally for the sound clip!
[ame="http://www.youtube.com/watch?v=r-4gVmAw6TU&feature=g-upl"]2013 Subaru BRZ GReddy Evo3 Catback Exhaust - YouTube[/ame]