Ok, long story short, I have 2012 GT, see details in my sig. When I bought the car, I really wanted a Shelby. Sometime in 2014, I will have the opportunity to either supercharge my car (undecided on TVS or Vortech). Or, I could trade it in for a Shelby. I owe less than my car is worth, so I am in pretty good shape as far as equity in the car is concerned. So, should I trade?