I love the sound of your G-packs. Just to add my $.02, When I had my exhaust done I had the H pipe installed just to maintain accessibility to the transmission etc. I think I would use the X pipe if I were to do it again. The biggest problem I had was the clearance between the trunk floor and the exhaust pipe where it runs over the axle. They ran it so tight that it clunked against the body and was also hitting the leaf springs when I went over bumps. Make sure to stick your nose under the car before accepting it. I had to go back 3-4 times before they finally pulled it out and did it correctly.
