Help with buying a car

I’m looking for a new car. But I really don’t know any more at the moment. Drive at the time Corsa C 1.7 CDTI 100ps annual speed approx 40000 km (70% Autobahn, 15%Land, 15% City) Wanted to spend up to max 30000 Euro Actually I like small sporty 3 doors. That’s why I had last year Ibiza FR/cubra with 1.9 TDi 130/160 Ps in mind. But the new model is no longer available with diesel > 100hp. Other small cars with “powerDiesel” are currently only Corsa D 1 But I don’t like 25 hp at all. And Fiat grande Punto, where the 1.6 diesel didn’t convince me about the performance. Is there any other alternative? Since my budget allows me to drive a number bigger: I like Scirocco, A3 and 1 BMW with 2 liters diesel. But if I spend so much I could also buy a used 3 Series BMW or Audi A4 with 6 cylinders which are much smoother. What makes me even more inconclusive is the Tatsach. Is there a few nice little 3doors -> Ibiza cupra 1.4 TFSI with 180hp and good consumption. So I really don’t know any more. Together: 1. wait until there are again small cars with power diesel? 2. Number bigger (eg A3,1bmw,scirocco) with good diesel buy new? 3. 1-2J ahre old car with 6cylinder diesel? 4. Saving petroler with good driving skills g? 5. Or drive my old one further and second car as petrol but then really into the direction Clio sport Cup 2.0 200 ps how do you see that? what would be the smartest variant in things performance+driving fun in combination with economic? Can you write your opinions about it? am also open to other car suggestions fals you there something. Greeting Matis