Best Mods For The Money

I have a 2012 Mustang GT with 402 miles on it. I bought it new, but it has been in my garage since day one. I had a 1996 Mustang GT that I had modded when we bought it new and was using it as my daily driver. I sold it last week purposely to force me to drive the 2012. Well, it's gone so I need some help determining what mods to install on the 2012. I would like to get some feedback on the best combination of exhaust, CAI and tune for these Coyote motor cars. I have the 6 speed with 3:73 gears. I'm not planning to install headers, but good to go on cat back. I also want it to have a good sound, but not to the point where all I hear is the exhaust while driving down the road. My 96 Mustang GT had Flowmaster exhaust (American Thunder) and it was perfect. When I hit the throttle, it lets you know, but when cruising you couldn't really hear much in the cabin. I had a full Bassani on an 03 Cobra I had a few years ago and it sounded good too. Especially when that supercharger was wound up. But that was a different motor like the coyote is. So, I need something that sounds good on the 5.0. Anyway, with all the experience here, I'm hoping to get some good ideas and maybe horsepower/torque numbers from the various mods you recommend. Thanks guys !!

Thanks for the recommendation Paul G. I have to admit that car did sound bad to the bone going through the tunnel. As I'm here in Florida, there are no tunnels I'm aware of, but a trip northbound during the summer wouldn't be out of the question. And thank you UPR for the suspension aspect. As a long time drag racer, I couldn't agree more with the suspension being a key element to the cars capabilities. You can have all the power you want, but if you can't hook up or hang in the turn, it's a lost cause. I have purchased from UPR in the past, and you guys always took good care of me so expect more to come. Anyone else have other exhaust, CAI recommendations ? Also, what about the Boss manifold as opposed to the Cobra Jet ? I do plan to get a tune with these mods, so if a different manifold will help, let me know. Thanks again guys !