We took our ACR to the "Tail of the Dragon" and getting about time for some new tires. I am thinking I can continue to run the Sport cups on the rear and put some 09 Viper tires with tread on the front... Will it handle OK for street driving/ drag strip sometimes? Will it be OK to mix? What tires should I buy? Please tell me what you think! I have 3200 mi on these tires and about 40% rubber left. KUHMOS rear, Original Sport Cups on front? HELP!!