Tires, MT vs GY vs Avons

[Red S/C]

I'm having a hard time deciding which tires to buy. My concern is strictly rear wheel traction. When I talked to MT they told me that they would not recommend any of their tires for a high horsepower Cobra. Roger Krause says the whole spectrum of Goodyears he sells will handle almost all the traction concerns one would have but he thinks the Avons are the best available. I overbuilt the engine and now I need tires to handle the rear wheels. I would like to hear recommendations from those of you that have actual experience with tires providing good traction. Thanks