I got hooked on this site originally after reading a review by warrenS5 on his Revo tune. Well, after a lot of research I ordered the tune on my Avant today. She's booked in in a couple of weeks . Wish it was tomorrow, but due to work etc....... On order is an APR Stage 2 tune with pulley upgrade. Going to let the intake slide for now and see if I can pick up one this Xmas when hopefully APR has a sale. The Carbonio Stage 2 CAI is about $1200 here, so fingers crossed, I can score a discount then. I ended up comparing APR, Revo and ABT. (ABT got dropped early on). Like Warren I liked the idea of using one company throughout to integrate everything. What swayed me in the end was the fact that the guys, who have looked after my Audis for years, are specialists in APR. Simple as that. The Revo set up was very close to APR. Between the two, one does higher kWs, while the other does higher Nms. There wasn't much in it. Pricewise they are about the same as well here. I'm looking forward to telling you what I think about unleashing the hidden ponies in my little sedate "family wagon" in a few weeks.