That may be but your line of thought but as a rarity on this occassion it is flawed so to give someone else that advice and then ignore another member's advice and research, really?
There are wheel manufacturers out there that manufacture stronger wheels than Audi and their suppliers. Don't be fooled into thinking OEM wheels are the last thing in safety, they are as good as some reputable wheel manufacturers out there and occasionally worse.
HRE, MAM, MTM, Sportec, BBS are but to name a few that are TUV approved, the same rating Audi use. My winter wheels are Ronal, same os OEM. And believe me I do my research on any part I put on the car to ensure it is as good if not better than OEM otherwise there is little point.