LOL! Congrats man, welcome to invidia ownage! i've been wondering why my invidia cat back sounds like my neighbors catless tbe on his 05 STi! Apparently if you opt for the "regular" N1 Catback, which i'm guessing you have because it is resonated, it is just as loud as the Race version! (which i have) upload a video!
Just putting this out there... There are 2 versions of the N1, one of them is a "regular" N1, and one of them is a "race" N1.
The difference between the Invidia "Race" N1 CBE and Invidia "regular" N1 CBE is the absence of a resonator as well as slightly less bends in the midpipe. I have also heard that the actual muffler of the "race" version follows a more straight through design.