Sorry to butt in guys...
I just wanted to let you know that I finally ordered my exhaust the other day. I decided to go with the Invidia catback exhaust. $399 from Splitting Imagez and shipping was free
I don't know if they'll be doing free shipping anymnore though because they tried to get me to pay shipping; told them the website said shipping was free, he confirmed it and viola! no shipping charge (which would've been about $45)
They were way helpful, I was able to get a GTS specific model (I didn't know there was one to begin with! I thought it was one-size fits all!)
I should be getting it at my doorstep sometime either tommorow or saturday
I'll be sure to post a review when it's installed, but that may not be until early spring, fyi.