Ben,
what are you going to be doing with the car & tyres. If you're intending to track day wait it out for the Pilot Super Sports, they are incredible a real balance between the hardcore R888 / A048 and road tyre. Even after some hard lapping on my RS3 the tyre corners and tread blocks are fully intact. The MPSS also work perfectly on road in the wet and even snow with quattro. I've tried many tyres and the MPSS are exceptional.
As others have said sure R888/A048 if it's just for track work - they can be a big handful on a cold, wet day.
Conti 5P are great road tyres but useless on track and quickly rubbed out by lap foolery.
Given the price and performance MPSS are my advice to make the most of the S3.