if your planning to keep your car for 10 years then don't get an audi. it's a nice car, but it's not really a long term car to keep. more like own it for 3 years then sell it.

the 2011 sti is a great choice and it's a lot faster than an a3 or a4, but the interior of the subaru is nothing compared to an a3 or a4. subarus are also known to get up to 100k miles with no issues, it's life span if maintained properly is up to 250k miles.

pero it's so nice to own a euro car, no japanese car can compare to the luxurious interior of a euro car. if you can afford to maintain the audi then i suggest you get that over the subaru.