I had a good learning experience with my 2013 mustang gt 5.0 / track pack / Recaro/ Paxton build. I had a full BMR suspension, short shifter, aluminum driveshaft, full 3" exhaust, Paxton 2200sl....ect. I hated the way it drove. So many sounds and clunks from all of the parts and was a pain to warm up and drive. Basically, it was fast and agile, but wasn't any fun to drive.
I test drove a pre-certified 10' 370 with 17k miles a few days ago and forgot what it was like to drive a smooth car. I parted the big stuff like the supercharger and fuel mods out and traded it in.
It came with the K&N typhoon CAIs, but I know they don't really do anything. Everything else is stock as far as I can tell.
I don't think I'm going to dive into modding quite yet, because I'm loving the 8 year/100,000 mile warranty.