Pretty nice car to have at 18, congrats. My first car was a GTI and I was in the same boat, not enough money to do much until I was about 19-20 then I went on a nice spending spree.

A few questions though.
1. why a cat'd downpipe? I'd get a test pipe (non brand name, any test pipe will do) and an ECU flash (GIAC). In my honest opinion, name brand exhausts for VW's are the biggest waste of money.
2. Where are your center caps?