Next thing to try is Spulen's turbo boost pipe kit offered by USP Motorsports! It's a big difference in throttle response and power. I got mine during last years Christmas sale and saved a bunch of money. Theyll probably be doing the same thing this year.
I'm a cash poor dubber so I went with the wheels and tires I was running on my Tiguan. They are 255/40 R19's. I'm thinking of 245/40's next time. If I can scrape up some cash for sports springs it should set up just right.