Just purchased a "new to me" 2012 5.0 GT Premium, manual, in Race Red with the Brembo package. It's pervious owner kept it immaculate and it only has 13K miles on it - very pleased with the deal I got! I love the car so far. This is not my daily driver, it's simply a "toy" for my wife and I and it will be going to bed for the Michigan winters.
Mods: I couldn't believe how quiet the stock exhaust was, so the first mod I bought was the Roush axle back. I listened to dozens of sound clips of both the Roush and GT500 exhausts and had a tough time deciding which of the two to get. Unfortunately, after hearing the Roush in person, I wish I would have gone with the GT500, so I'm probably going to look to sell or trade the Roush. It just doesn't sound like I had hoped - too mush rasp under hard acceleration for my tastes.
The only other mod I've done, if even considered a mod, is a white cue ball style shift knob - which I love! I'm probably going to look into a custom tune and possibly a CAI maybe next year. My ultimate goal is forced induction, but convincing the wife that it is necessary is a whole other battle....
I have OCD when it comes to cars, so I've already washed it a couple times and put two coats of Zaino (great stuff) on it already even though I've only driven it maybe 100 miles since I got it.
I used to have a '04 GTO with a Magnacharger blower, LT headers, JBA catback, intake, and custom dyno tune, but sold it due to changing life circumstances. I loved that car and was sad to see it go, so I was pretty pumped that the wife allowed "us" to get another toy car