If you spent around $30K for your car. Don't worry about saving a few hundred on tires or trying to get a few extra miles out of your tires. Buy the best you can fit and enjoy your car. Cheap tires take away from your performance. I pulled off my Brembo pckg wheels for Roush 18X10s with Nitto 555R 305/40/18 and Invo 275/40/18 up front. I am absolutely loving it.
2012 Mustang GT: Edelbrock E-Force Supercharger; Steeda UCA & LCA; BBK Long Tube Headers & x pipe; 3.73, Brembo, Roush 18X10, Nitto 555R Drag Radial 305/40/18, Magnaflow Cat Back. I am just lucky my wife let me buy and modify this car.