Hey guys, I'm new here and have a 2011 gt/cs. My father wants to buy it so i'll be buying another 2011/12 gt in the very near future. I'll have around 30k to spend and have already found a decent amount of cars to choose from. It will be supercharged and my question is: which one? and yes, i know this has been beaten to death.

The car will be my DD and will see a bunch of races on the street and on rare occasions, time permitting, will see the drag strip. It will have around 295 Michelin PSS's as the tire year round. I will mod the car up or down to get around 650rwhp and it will be a M6. Which one would be the quickest on the street. I'm leaning towards a car with a Roush or Whipple. Please tell me your choice and why?
Thanks,
Kyle