Thinking of buying an S3, and would be interested to hear what people consider 'must have' options after you've owned the car for while. You know the sort, the ones where you think "I wish I'd have ordered x or y." I've been through the options list, and this ia what I reckon I need. -metallic paint -alcantara/leather sports seats (not buckets) -multi function wheel, Is there any difference between the flat bottom wheel and round one? -bose sound -Interior light pack, is this necessary?