Why an A3?

I want to buy a new car. 3 doors and sporty. The car should not be a cheap car, so without constant repetitions. My first research was the Audi A3 102 hp. There is with automatic air conditioning starting from 17.000. Then I heard that it is actually only an expensive and noble VW and I came to the SEAT Ibiza, which is supposed to be a cheap VW. But from the technology should be like Audi, VW and Seat, because they come from the same house. The Ibiza there are from 10,000. There are reasons for the A3 and against small cars of the 10,000 EUR class? Why should I not buy the Ibiza? Also looks good and it should consist mostly of VW Polo technology. I think that I pay at Audi 5000 EUR only for the brand. Or do I see this wrong? Which comparable but cheaper cars are there that would be comparable to the A3? Ford Focus costs almost more, VW Golf, Polo Fox are too unportable for me… Currently I can’t find myself between the A3 and ==References==