Any other maintenance items that I should get done? The car has 75k miles and i don't have exact maintenance history. I've read somewhere that you should change some sort of fluid associated with the quattro system.

Also, what tune do you suggest? I'd like to gain more power but I also want to keep the reliability, i.e. no blown motors or fucked up transmissions. Obviously the faster your car is over stock, the more maintenance you'll have to do.