458 Best Header - Full Exhaust Combo for maximum power

So now that the 458 platform is sufficiently mature (old), and many different vendors have come and gone for exhaust, i'm hoping to learn from other's experience here on the best after market full exhaust system to purchase for maximum torque and HP gains. Obviously i'll have to remap the ECU to match the new breathing profile of the engine, but there are so many different styles of headers and cat back exhaust on the market, i need to filter out the noise.

Thank you!