Personally, I like the sound of the stock exhaust system. Then again too, I like to have the windows down while driving the car. Just a couple of weeks ago, I spent well over 20+ hours in the seat driving at various speeds for extended periods of time. The sound level of the exhaust was always very comfortable and in my way of thinking, intoxicating, and, I really like the sound of the super-charger as well. Just broke the 10K mile mark on this trip and the car has never run better. Take delivery of the car and drive it. Have some fun in it and if you still feel that you need to change out the system, do it.
Know too, that we have other cars with various exhaust notes: 65 Big Block Vette with side pipes (need ear protection with drives of over 50 miles, (heck, make that 20 miles, but still wonderful): 355 Ferrari GTS, lovely sounds with the top off as well as on, with OEM exhaust: C-1 and C-2 Vettes with off-road exhaust systems, simply wonderful, and a couple of air cooled Porsche's. So, if there is a need for an exhaust thrill, we can choose the flavor for the day or mix it up during the day.... DJ.
PS: Don't really need a louder exhaust to get noticed in the FGT...... Just wait till you drive it a bit..... You will be amazed.