I'd drive a turbocharged car with anti-lag. But flames would go out of the pipes. Not really street legal.
Thought I don't like its looks, I prefere the SLK 55 AMG over the Z4 M35i. Same weight, better weight distribution due to shorter and lighter V8 block and 540 Nm from a NA engine. 7.200 RPM redline is not bad either. No N54/N55 will sound like a NA AMG V8.
Until there'll be NA engines I'll stick to them. Later maybe NA engine with hybrid tech.