However, these claims sound like BS to me at this point. There are reasons why sports cars come with turbochargers. You'll probably have a good amount of low-end torque but not as much top-end power. Turbochargers have smaller drag and are more efficient. I don't believe for a bit that increasing boost from 12 to 16psi would take you from 400RWHP to 600RWHP. Changing pulley ratios will give you higher peak boost but at the cost of drag. With upgraded turbos peak boost is not an issue anyways.
The benefits of superchargers are obvious, but turbos are more suited to sports cars. Again congrats for being unique (no I'm not sarcastic).