Hey Bro, Welcome back n Thanx for your service too!! I am a Stang owner repeatedly. Hate Fords, luv Mustangs!! I have for GT from each of the last 3 decades! '85 5.0 Gt Convertible(Caymen Island Green) Black rag/ Chrome Ponies no mods. '95 5.0 GTS(Triple Black) Pulleys/ Straight Pipes out of the cats/ Hypertech chip/ Chrome Bullit rims.
Now, about your new GT...
Last year I bought a 2007 GT, Grabber Orange and some add ons...
Roush stripes bumper to bumper
Roush scoup Non Functional
Roush solid side window covers
Boss Custom 20" Chromes...
Performance wise, I put on an SLP Axle Back Exhaust, BAD ASS Bro!! I have always been a fan of the Flowmaster exhausts until I got this. This exhaust is wicked sick sounding, much different than the others, really edgy and stock car sounding. I have people asking me every day what my exhaust is.
I also bought a JLT Series 11 Cold Air Intake (matching car color) and a Hypertech Max Energy Programmer.
I'm going to put some Underdrive Pulleys/ an X or H Pipe/ and a Tach Shift Light, not much more so I don't void my warranty.
Just the EXHAUST,CAI, and PROGRAMMER make a huge difference in performance. I have 10k on my car now and it runs like it's on FIRE!!
Good luck with your bolt ons,
"Semper Fi" Brother.