Quick question for you...Does the tachometer change colors like a shift light? I have heard the 2012 have this but have yet to see it.
The big restriction is the stock cat so if you want more sound and power replace that with a high flow cat or a test pipe.
The downpipe is a bitch to change so you have to decide if its worth the effort, or money if you pay a shop. I personally did it because I got a deal on a full turbo back exhaust. If I had to buy an exhaust piece by piece I would have probably waited until its time for a bigger turbo.