As far as doing your own work goes, I reckon Audi's are the worst effing cars to work on....lots of special tools and too many darn weird sensors all over the car etc.....parts can also be expensive.

However, if you DO decide to go the VW/AUDI route and you are most likely looking at the 12v motor, just ensure that it had the water pump, thermostat and timing/accessory belts and updated idlers replaced lately (and before 60k) plus regular auto tranny service.