Hi Alan,
Borla & Invidia gear is top quality, I have a 17 GT , I went with a Borla touring resonator and an Invidia Q300 sport rest of way to the back , I found without a resonator the exhaust was a touch too loud and drony for me , as I do a lot of longer drives on motor ways where you spend a lot of time at around 1800 to 2000 rpm where drone really shows up , I also dyna matted the boot which made a noticeable reduction in road noise too !