Congrats on your purchase. If you want some substantial performance go for a chip upgrade. I have APR's software and love it. Highly recomended!

 

I say tint the windows. Not really what I would call a mod though. If you're looking for performance mods, like everyone else will tell you, the chip is the most bang for your buck. I plan on going the APR route with my B7 when I get back from Iraq. I also like the Milltek exhaust. Thinking about going to 18" wheels. I'll take a look at all the body kits out there when I get back, too. I would like to have a more RS4ish look.