Very nice upgrade. I've been shopping around for a avant for myself. The 3.0 is a very good DD car. Most people just put an intake and exhaust and call it a day. Just remember you went from a Honda to an Audi. The parts prices went with that jump. A decent exhaust will run you between 1300 and 1600. I have an awe exhaust on my s4 and it has a great sound. Vmr wheels are a really good brand. They seem to cater well to the Audi world. Most people run coilovers but a good price is around 900. Keep it clean!